Task: Program Execution
Input (English): 7, 26, ['X', '5589', '83', 't', 'k', 'D', 'L', '4157', '9719', '5771', 'r', '835', 'n', '9085', '9899', 'u', '8837', '599', 'd', 'n', '697', '8493', 't', '7909', '5579', 'U']
Output (English): L415797195771r835n90859899u8837599dn6978493t79095579U