emojicode, 121 bytes

Result

WA

Code [DL]

🏁 🍇
  🍮 s 🔤hello🔤
  🔂 c s 🍇
    🍊 😛 c 🔟h 🍇
      😀 🔤HELLO🔤
    🍉
  🍉
🍉

stdin

10110111
11111111
00101101
01010001
11000100
00000011
00011100
01101001
01100010
11001100
01001100
01000110
01000010
00011100
11100111
11010000
00000010
00010000
10001000
01101110
11111101
11000110
00100011
10100001
10101011
01100001
01100111
01010010
00001111
01111000
11100110
10011001
01001110
00110111
00000001
01011011
10111110
00000110
00110111
11100011
11011110
00101000
10101111
00100100
00111000
00000000
11010010
00010101
00001010
01001101

stdout

HELLO

stderr

⚠️ line 2 col 8 /tmp/code.emojic: Variable "s" was never mutated; consider making it a frozen 🍦 variable.

strace