Task: Program Execution
Input (English): z, 9, F, 7, 0, X, u
Output (English): [['z', '9', 'F', '7', '0', 'X'], ['z', '9', 'F', '7', '0', 'u'], ['z', '9', 'F', '7', 'X', 'u'], ['z', '9', 'F', '0', 'X', 'u'], ['z', '9', '7', '0', 'X', 'u'], ['z', 'F', '7', '0', 'X', 'u'], ['9', 'F', '7', '0', 'X', 'u']]