a = input()
b = input()
c = input()
d = input()
e = input()
f = len(a)
g = len(b)
h = len(c)
i = len(d)
j = len(e)
if f>g:
    print(a)
elif g>h:
    print(b)
elif h>i:
    print(c)
elif i>j:
    print(d)
else:
    print(e)