Task: Program Execution
Input (English): 6, 19, ['623', 'k', '1127', '1235', '5469', 'U', '3735', '6967', 'm', '2135', 'X', 'X', '1779', 'b', '3319', '2465', 'Z', 'f', 'f', '1031', 'n', 'K']
Output (English): U37356967m2135XX1779b33192465Zff