Task: Program Execution
Input (English): Z, 5187, 1337, f, j, i, 2639, 1455, 8713, Y, p, 5107, H, 7181, L, Y, 6409, D, 5903, a, 2787
Output (English): 1, 4, 5, 6, 10, 11, 13, 15, 16, 18, 20