Task: Program Execution
Input (English): 7, ['1363', '6277', 'L', 'd', 'u', '4129', '6999', '2509', '1405', 'u', 'S', 'S', '6097', 'I', 'J', 'u', 'd', '4609', 'D', '6617', '5535', '4873', 'W', '955', 'a', 'Z', '1655']
Output (English): 1363, 2509, J, 4873