Task: Program Execution
Input (English): 15, 18, ['Z', 'K', '8837', '8023', 'H', '4565', 'u', 'Y', 'o', 'x', 'I', 'u', '941', '5425', 'l', 'L', 't', 'P', 'r', 'G', '7207', '7491', '5969', '6967', '1029']
Output (English): P, t, L, l