
def row_perm_rec(numbers):               # numbers: [list(int)]
    range(numbers[0])                    # [list(int)]

puzzlecolumns = [[7]]                    # [list(list(int))]
puzzlerows = [[8]]                         # [list(int)]

['u']                          # [list(str)]

row_perm_rec(puzzlerows[0])                 # []

