Task: Program Execution
Input (English): 1, 18, ['M', 'K', 'K', '3631', 't', 'J', 'd', '1309', 'Z', '2125', 'h', '9031', '1855', 'y', 'c', '7961', 'm', '209', 'y']
Output (English): MKK3631tJd1309Z2125h90311855yc7961m209