Task: Program Execution
Input (English): 6, 18, ['u', 'S', '8593', 't', 'P', '2649', '9521', 'T', 'S', '2429', '6111', 'O', '5287', '5567', 'y', 'E', 'T', 'U', 'M', '9783', '767', 'x']
Output (English): 26499521TS24296111O52875567yETU