t0 = str(input())
t1 = str(input())
a = t0.split(".")
b = t1.split(".")
flag = False
if int(b[0]) < int(a[0]):
  flag = True
  print("YES")
elif int(b[0]) > int(a[0]) and flag == False:
  flag = True
  print("NO")

if int(b[1]) < int(a[1]) and flag == False:
  flag = True
  print("YES")
elif int(b[1]) > int(a[1]) and flag == False:
  flag = True
  print("NO")

if int(b[2]) < int(a[2]) and flag == False:
  flag = True
  print("YES")
elif int(b[2]) > int(a[2]) and flag == False:
  flag = True
  print("NO")

if flag == False:
  print("YES")