dr = int(input())
mr = int(input())
gr = int(input())
d = int(input())
m = int(input())
g = int(input())
if g>gr+18:
    punoletan = True
elif g<gr+18:
    punoletan = False
else:
    if m>mr:
        punoletan = True
    elif m<mr:
        punoletan = False
    else:
        if d>=dr:
            punoletan = True
        else:
            punoletan = False
if punoletan:
    print("DA")
else:
    print("NE")