Task: Program Execution
Input (English): 2981, 3335, u, 6997, 7849, m, 8351, 5299, 8507, Z, 9179, 7719, o, 4343, O, G, 145, e, K, I, 6881
Output (English): 2981, 3335, 6997, 7849, 8351, 5299, 8507, 9179, 7719, 4343, 145, 6881