Task: Program Execution
Input (English): U, N, 0, B, C, v, X
Output (English): [['U', 'N', '0', 'B', 'C', 'v'], ['U', 'N', '0', 'B', 'C', 'X'], ['U', 'N', '0', 'B', 'v', 'X'], ['U', 'N', '0', 'C', 'v', 'X'], ['U', 'N', 'B', 'C', 'v', 'X'], ['U', '0', 'B', 'C', 'v', 'X'], ['N', '0', 'B', 'C', 'v', 'X']]