Task: Program Execution
Input (English): 10, 12, ['4333', '7267', 'R', 'P', 'e', 'f', '1809', '1015', '9521', 'x', '7369', 'I', '4149', 'z', 'k', '725', '9937', 'N', '3699', 'q', 'x', '1681', 'H']
Output (English): I9637x