import math
v = input().replace('.',' ')
v1 = list(map(int, v.split()))
v = input().replace('.',' ')
v2 = list(map(int, v.split()))
#print(v.split(),v1,v2)

v1i = (v1[0]*1000 + v1[1])*1000 + v1[2]
v2i = (v2[0]*1000 + v2[1])*1000 + v2[2]
#print(v1i,v2i)

if v1i >= v2i: print("YES")
else: print("NO")