def check_rows(board):
    """
    list -> bool
    This function checks if every row has different numbers and returns
    True is yes, and False if not.
    >>> check_rows(["**** ****", "***1 ****", "**  3****", "* 4 1****", \
"     9 5 ", " 6  83  *", "3   1  **", "  8  2***", "  2  ****"])
    True
    >>> check_rows(["**** ****", "***1 ****", "**  3****", "* 4 4****", \
"     9 5 ", " 6  83  *", "1   1  **", "  8  2***", "  2  ****"])
    False
    """
    for row in board:
        numbers = []
        for elem in row:
            if elem == '*' or elem == ' ':
                continue
            else:
                if elem in numbers:
                    return False
                numbers.append(elem)
    return True