Task: Program Execution
Input (English): z, 5875, 4231, 7701, L, P, R, i, 5035, 7057, 3843, 4061, C, 4187, T, u, h, I, 6861, 2587, 5451, v, x
Output (English): 1, 5, 6, 7, 8, 13, 15, 16, 17, 18, 22, 23