Task: Program Execution
Input (English): 4991, 5949, 5455, 6771, 5481, 8091, 5395, 7019, 3693, 3119, Z, S, 9125, 5623, G, m, z, 911, z, U, 5563, m, b
Output (English): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 18, 21