def reshape4(arr):
    """
    reshape into 6x7 without numpy 
    """
    line1 = arr[0:7]
    line2 = arr[7:14]
    line3 = arr[14:21]
    line4 = arr[21:28]
    line5 = arr[28:35]
    line6 = arr[35:42]
    board = [line1, line2 , line3, line4, line5, line6] 
    return board