diff --git a/ass3/zbirnik/parsing/input_invalid.asm b/ass3/zbirnik/parsing/input_invalid.asm
new file mode 100644
index 0000000..0b46a01
--- /dev/null
+++ b/ass3/zbirnik/parsing/input_invalid.asm
@@ -0,0 +1,43 @@
+arithr START 0 .komentar1
+    LDS #11  .komentar2
+    LDT #5
+    .komentar3
+    LDA ZERO
+    ADDR S, A
+    ADDR T, A
+    STA sum 
+    FIX
+    FLOAT    
+    .komentar4
+    LDA ZERO 
+    ADDR S, A 
+    SUBR T, A
+    STA diff
+    HIO
+    LDA ZERO 
+    ADDR S, A
+    MULR T, A
+    STA prod
+
+    LDA ZERO 
+    ADDR S, A
+    DIVR T, A
+    STA quot
+    FIX . s komentarjem
+    LDA ZERO
+    ADDR S, A
+LOOP SUBR T, A .komentar5
+    COMPR A, T
+    JGT LOOP
+    JEQ LOOP
+    STA mod 
+HALT J HALT 
+    END arithr
+
+ZERO WORD 0 
+sum RESW 1
+diff RESW 1
+prod RESW 1
+quot RESW 1 .komentar6
+mod RESW 1
+.komentar7
diff --git a/ass3/zbirnik/parsing/pregledovalnik.go b/ass3/zbirnik/parsing/pregledovalnik.go
index 384936e..81b4253 100644
--- a/ass3/zbirnik/parsing/pregledovalnik.go
+++ b/ass3/zbirnik/parsing/pregledovalnik.go
@@ -4,21 +4,89 @@ import (
     "fmt"
     "os"    
     "regexp"
+    "strings"
 )
 
-/*
+
 type ukaz struct {
     opcode int 
     st_operandov int
-    format int
+    format int // F1 - 1, F2 - 2, F3 - 3, F4 - 4, SIC - 5
+    velikost int //v bajtih
 }
 
-var ukazna_tabela = map[string]ukaz{
-    "LDA":
-}*/
+var ukazna_tabela = map[string]int{
+    "ADD": 0x18, 
+    "ADDF": 0x58,
+    "ADDR": 0x90, 
+    "AND": 0x40, 
+    "CLEAR": 0xB4,
+    "COMP": 0x28,
+    "COMPF": 0x88,
+    "COMPR": 0xA0,
+    "DIV": 0x24, 
+    "DIVF": 0x64,
+    "DIVR": 0x9C, 
+    "FIX": 0xC4, 
+    "FLOAT": 0xC0,
+    "HIO": 0xF4, 
+    "J": 0x3C, 
+    "JEQ": 0x30, 
+    "JGT": 0x34, 
+    "JLT": 0x38,
+    "JSUB": 0x48,
+    "LDA": 0x00, 
+    "LDB": 0x68, 
+    "LDCH": 0x50,
+    "LDF": 0x70,
+    "LDL": 0x08, 
+    "LDS": 0x6C,
+    "LDT": 0x74,
+    "LDX": 0x04,
+    "LPS": 0xD0,
+    "MUL": 0x20,
+    "MULF": 0x60,
+    "MULR": 0x98,
+    "NORM": 0xC8, 
+    "OR": 0x44,
+    "RD": 0xD4,
+    "RMO": 0xAC,
+    "RSUB": 0x4C,
+    "SHIFTL": 0xA4,
+    "SHIFTR": 0xA8,
+    "SIO": 0xF0,
+    "SSK": 0xEC, 
+    "STA": 0x0C,
+    "STB": 0x78, 
+    "STCH": 0x54,
+    "STF": 0x80,
+    "STI": 0xD4,
+    "STL": 0x14,
+    "STS": 0x74, 
+    "STSW": 0xE8, 
+    "STT": 0x84, 
+    "STX": 0x10, 
+    "SUB": 0x1C, 
+    "SUBF": 0x5C, 
+    "SUBR": 0x94, 
+    "SVC": 0xB0, 
+    "TD": 0xE0, 
+    "TIO": 0xF8, 
+    "TIX": 0x2C, 
+    "TIXR": 0xB8,
+    "WD": 0xDC
+}
+
+// Pregledovalnik bere vhodne vrstice in jih razgradi na posamezne enote.
+// Razpoznane elemente okvalificira (oznaka / mnemonik / operand / komentar) 
+// //<zbirniski stavek> ::== [<oznaka stavka>] <ločilo> <mnemonik> <ločilo> {<operand> <ločilo>} [<komentar>]
+
+
 
 func main() {
-    inputbyte, err := os.ReadFile("input.asm")
+    //register, _ := regexp.Compile("A|X|L|B|S|T|F")
+    
+    inputbyte, err := os.ReadFile("input_invalid.asm")
     if err != nil {
         fmt.Println("Error reading input file: ", err)
         return
@@ -26,7 +94,7 @@ func main() {
     input := string(inputbyte)
     pattern := regexp.MustCompile(`.*\n`)    
     matches := pattern.FindAllString(input, -1)
-    //var cleared_matches []string
+    //var AST []ukaz
     for _, el := range matches {
         match_pure_comment, err := regexp.MatchString(`(?m)^[\t ]*\..*$\n`, el)
         if err != nil {
@@ -42,14 +110,19 @@ func main() {
         if match_empty {
             continue
         }
-        match_command, err := regexp.MatchString(``, el)
-        fmt.Print(el)     
+        match_F1, err := regexp.MatchString(`(?m)^[A-Za-z_]*[\t ]+[A-Za-z]+[\t ]*(\..*)?$\n`, el)
+        if err != nil {
+            fmt.Println("Error while matching string.")
+        }
+        if match_F1 {
+            var nov_ukaz ukaz
+            nov_ukaz.format = 1
+            nov_ukaz.st_operandov = 0
+            nov_ukaz.velikost = 1
+            pattern := regexp.MustCompile(`[\t ]+[A-Za-z]+`)
+            mnemonik := strings.Trim(re.FindString(el), " \n")
+            nov_ukaz.opcode = ukazna_tabela[mnemonik]; 
+            fmt.Print(mnemonik)
+        }  
     }
-    //Zbirnik mora opraviti naslednje naloge:
-    //1) Pregledati in razčleniti zbirniški stavek (pregledovalnik)
-    //2) Mnemonike nadomestiti z operacijskimi kodami
-    //3) Simbolična imena nadomestiti z ustreznimi številskimi ekvivalenti 
-    //4) Razrešiti simbolične operande
-    //...
-    //<zbirniski stavek> ::== [<oznaka stavka>] <ločilo> <mnemonik> <ločilo> {<operand> <ločilo>} [<komentar>]
 }
diff --git a/ass3/zbirnik/parsing/test.go b/ass3/zbirnik/parsing/test.go
index 7d7ed38..1e5750b 100644
--- a/ass3/zbirnik/parsing/test.go
+++ b/ass3/zbirnik/parsing/test.go
@@ -2,16 +2,9 @@ package main
 
 import (
  "fmt"
- "regexp"
 )
 
 func main() {
-    pattern := regexp.MustCompile(`o\w*g`)
-    fmt.Println(pattern.FindString("oogenesis")) // returns ""
-    fmt.Println(pattern.FindString("ck"))        // returns "ook"
-    fmt.Println(pattern.FindString("oocyst"))    // returns ""
-    fmt.Println(pattern.FindString("book"))      // returns "ook"}
-    match, what := regexp.MatchString("p([a-z]+)ch", "peach")
-    fmt.Println(match)
-    fmt.Println(what)
+    i := 0xB4
+    fmt.Println(i)
 }