Task: Program Execution
Input (English): 4, 21, ['W', '9229', '3413', 'p', '8757', '1137', '1651', '307', '7109', '4363', '9987', '8505', 'T', 'V', '4603', 't', '5139', '3365', 'q', '5737', '2707', 'r', 'j', 'D']
Output (English): 27075737q33655139t4603VT8505998743637109307165111378757p