Task: Program Execution
Input (English): j, 7907, 6401, X, 5189, 63, 9509, 787, 2467, P, 7755, b, k, S, 9247, I, 7129, f
Output (English): 7907, 6401, 5189, 63, 9509, 787, 2467, 7755, 9247, 7129