diff --git a/src/Makefile b/src/Makefile
index 3614a3c..d49bec6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,6 +1,13 @@
 LDFLAGS="-L/usr/local/opt/flex/lib"
 
 
+automaton: ram
+	./ram < stack.asm
+	echo "### machine.py ###"
+	cat machine.py
+	echo "### execution ###"
+	python machine.py
+
 bubble_sort: ram
 	./ram < bubble_sort.asm
 	echo "### machine.py ###"
diff --git a/src/stack.asm b/src/stack.asm
index e0f1ec9..9c06274 100644
--- a/src/stack.asm
+++ b/src/stack.asm
@@ -1,17 +1,15 @@
-(5,2,5,5,0)
+(37, 6, 0, 0, 0, 1, 1, 1, 0, 0, 3, 2, 1, 3, 0, 0, 0, 1, 2, 1, 1, 0, 0, 1, 0, 0, 2, 2, 1, 0, 0, 2, 2, 2, 3, 1, 3, 1)
 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(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(11, 0, r11)     // r11 address of stack top
+ADD(3, 0, r12)      // r12 bottom symbol
+ADD(i0, 1, r7)      // r7 address registry after last instruction in input
+ADD(i1, 2, r10)     // r10 last symbol of input word address + 1
 
-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′)
+ADD(i1, 2, r2)      // r2, address first automaton instruction begin state 'q',  instruction: (q, a, A, w, q′), (reset loop)
 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
+JE(r2, r7, 42)      // 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
@@ -19,20 +17,52 @@ 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
+JUMP(-8)            // if not, next iteration
 
-JE(i@r1, 2, 3)      // read symbol is epsilon
-JE(i@r3, i@r1, )    // symbol in input == read symbol
-JUMP(-12)
+JE(i@r1, 2, 4)      // read symbol is epsilon
+JE(r1, r10, -11)    // check if input word has been read, if yes next iteration
+JE(i@r3, i@r1, 5)   // symbol in input == read symbol
+JUMP(-12)           // next iteration
 
-JE(i@r4, 2, )       // read stack symbol is epsilon (read symbol was epsilon)
-JE(r@r6, i@r4, )    // stack top is the expected symbol
+JE(i@r4, 2, 6)      // read stack symbol is epsilon (read symbol was epsilon)
+JE(r@r11, i@r4, 8)  // 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
+JE(i@r4, 2, 10)     // read stack symbol is epsilon (read symbol was symbol in input)
+JE(r@r11, i@r4, 14) // stack top is the expected symbol
 JUMP(-18)
 
+ADD(i@r6, 0, r0)    // a=epsilon, A=epsilon, replace current state
+JE(i@r5, 0, -22)    // restart loop if nothing to write on stack
+JUMP(16)            // go to copy word on stack
+
+
+ADD(i@r6, 0, r0)    // a=epsilon, A=symbol
+JE(i@r5, 0, 2)      // check if word to copy is empty
+JUMP(13)            // go to copy word on stack
+JUMP(-27)           // restart loop
+
+ADD(i@r6, 0, r0)    // a=symbol, A=epsilon
+ADD(r1, 1, r1)      // move cursor in input word
+JE(i@r5, 0, -30)    // restart loop
+SUB(r11, 1, r11)
+JUMP(7)             // go to copy word on stack
+
+ADD(i@r6, 0, r0)    // a=symbol, A=symbol
+ADD(r1, 1, r1)      // move cursor in input word
+JE(i@r5, 0, 2)      // check if word to copy is empty
+JUMP(3)             // go to copy word on stack
+SUB(r11, 1, r11)
+JUMP(-38)           // restart loop
+
+SUB(r6, 1, r9)      // address symbol to copy on stack
+JE(r9, r5, -40)     // inner loop condition, restart outer loop
+ADD(r11, 1, r11)
+ADD(i@r11, i@r9)
+SUB(r9, 1, r9)
+JUMP(-4)
+
+
 JE(r0, 1, 3)        // check if final state
 ADD(0, 1, o1)       // reject = 1
 JUMP(2)