Task: Program Execution
Input (English): 5421, q, I, 1021, U, K, i, 8063, 8921, 6967, b, b, Z, 2437, 6547, 4381, b, 2711, L, r, C, Q
Output (English): 5421, 1021, 8063, 8921, 6967, 2437, 6547, 4381, 2711