EmojASM

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Broken down into logic:

Move forward on tape 1, read the value into reg A

Compare reg A to 0 (read: have we reach end of indexes)

Load reg A into reg X

Load garbage address into reg A

If compare earlier was true jump to garbage and die

Else reset tape 0

---JUMP BACK POINT---

Load value from reg X back into reg A

Step forward in T0

Decrement reg A

Compare reg A to 0 (read: are we at right char)

Load reg A into reg X

Load address of jump back point into A

If earlier comparison not true (i.e not at the char yet) jump to jump back point

Else (we are at the char) read T0 and output, jump back to start

Flag: ractf{5huffl1n'}