Task: Program Execution
Input (English): 21, 25, ['6899', '9305', '5775', 'F', 't', '1021', 'i', 'u', '7455', '3683', '4319', '1443', '2021', '1719', '945', 'Y', '6835', 'l', '6449', 'Z', 'K', 'H', 'T', '815', '7961', '4417', 'Q', '959']
Output (English): 1697518THK