diff --git a/src/ram.l b/src/ram.l
index e9049c7..b855e0b 100644
--- a/src/ram.l
+++ b/src/ram.l
@@ -17,6 +17,6 @@ JUMP|JE|JL          { yylval = strdup(yytext); return OP_CTRL;}
 [ ]*,[ ]*           {return COMMA;}
 \(                  {return PAR_O;}
 \)[ ]*("//".*)?     {return PAR_C;}
-\n                  {return SEPARATION; }
+\n+                 {return SEPARATION; }
 .                   {printf("token inconnu\n"); yyterminate();}
 %%
diff --git a/src/stack.asm b/src/stack.asm
index 7540a8d..e0f1ec9 100644
--- a/src/stack.asm
+++ b/src/stack.asm
@@ -1,21 +1,40 @@
 (5,2,5,5,0)
 ADD(0, 0, r0)       // r0 current state in pushdown automaton
 ADD(2, 0, r1)       // r1 cursor position in input word, (i2 first symbol of input word, i1 length of input word)
-ADD(9, 0, r8)       // r8, address of stack top
-ADD(2, 0, r9)       // r9 bottom symbol
+ADD(10, 0, r9)      // r9 address of stack top
+ADD(2, 0, r10)      // r10 bottom symbol
+SUB(i1, i2, r7)
+SUB(r7, 2, r7)      // r7 number of instructions
+
+ADD(1, 0, r8)       // reset loop counter
 ADD(i1, 2, r2)      // r2, address first automaton instruction begin state 'q',  instruction: (q, a, A, w, q′)
+JUMP(3)             // skip loop increment on 1st iteration
+ADD(1, r8, r8)      // increment loop counter
+ADD(r6, 1, r2)      // r2, address of next instruction to check
+JL(r8, r7, )        // loop condition
 ADD(r2, 1, r3)      // r3, address instruction read symbol 'a'
 ADD(r3, 1, r4)      // r4, address instruction read stack symbol 'A'
 ADD(r4, 1, r5)      // r5, address, instruction word pushed on stack length
 ADD(r5, i@r5, r6)
 ADD(1, r6, r6)      // r6, address, next state q'
 
+JE(r0, i@r2, 2)     // current state is the expected state in the instruction
+JUMP(-9)            // if not, next iteration
 
-JE(r0, i@r2, )      // current state is the expected state in the instruction
-
-JE(i@r1, 2, )       // read symbol is epsilon
+JE(i@r1, 2, 3)      // read symbol is epsilon
 JE(i@r3, i@r1, )    // symbol in input == read symbol
-JUMP()
-JE(i@r4, 2, )       // read stack symbol is epsilon
-JE(r@r6, i@r4, )    // stack top is the to expected symbol
+JUMP(-12)
 
+JE(i@r4, 2, )       // read stack symbol is epsilon (read symbol was epsilon)
+JE(r@r6, i@r4, )    // stack top is the expected symbol
+JUMP(-15)
+
+JE(i@r4, 2, )       // read stack symbol is epsilon (read symbol was symbol in put)
+JE(r@r6, i@r4, )    // stack top is the expected symbol
+JUMP(-18)
+
+JE(r0, 1, 3)        // check if final state
+ADD(0, 1, o1)       // reject = 1
+JUMP(2)
+ADD(0, 0, o1)       // accept = 0
+ADD(0, 1 ,o0)       // output size in o1
diff --git a/src/test.asm b/src/test.asm
index f462442..8e85802 100644
--- a/src/test.asm
+++ b/src/test.asm
@@ -1,5 +1,6 @@
 (10,5,1,2,4)
 ADD(i0 ,1 ,r0)
 SUB(i1,3,r1)
+
 MULT(r1,r0,o1)
 ADD(5, i@i2, o2)