Task: Program Execution
Input (English): x, L, o, 6637, k, Z, 2321, 7901, 4645, V, i, z, i, 8329, 4369, c, 7319, 3745, c, 1303, 2503
Output (English): 1, 2, 3, 5, 6, 10, 11, 12, 13, 16, 19