Task: Program Execution
Input (English): a, 7, V, 7, M, p, s
Output (English): [['a', '7', 'V', '7', 'M', 'p'], ['a', '7', 'V', '7', 'M', 's'], ['a', '7', 'V', '7', 'p', 's'], ['a', '7', 'V', 'M', 'p', 's'], ['a', '7', '7', 'M', 'p', 's'], ['a', 'V', '7', 'M', 'p', 's'], ['7', 'V', '7', 'M', 'p', 's']]