Task: Program Execution
Input (English): 13, 19, ['9903', '6303', '6873', 'y', '31', '6037', '7011', 'Z', '3193', '5575', '1623', 'u', '3817', 't', 'F', '6319', '8157', '581', '3991', '7135', '1557', 'C', '2961', 'F', 'B']
Output (English): 3817tF631981575813991