Task: Program Execution
Input (English): 21, ['I', 'k', 'C', 'U', '2153', '8327', 'F', 'Z', 'o', '2865', 'l', '1345', 'Q', '29', '3403', 'A', 'f', '4065', 'Y', 't', '5779', 'B', 'u', 'L', 'x', 'c', 'D', 'k', '5527', 'T', '8103', '7239', '6389', 'D', 'd', 'x', '9869', '4749', 'u', 'd', '9325', '753', 'H']
Output (English): I, B, H