ctr = 0
uctr = 0
umax = uctr

while True:
    ctr = ctr + 1
    if ctr > 1 and sum([int(i) for i in str(uctr)])%7 == 0:
        uctr = uctr - 7
    else:
        uctr = uctr + 2

    if uctr > umax:
        umax = uctr
        print("MAX = ", umax)