def check(A,B):
  l={}
  for i in xrange(len(A)):
    if A[i] not in l:
      l[A[i]] = 0
    l[A[i]] += 1
  for i in xrange(len(B)):
    if B[i] not in l:
      print "NO"
      return
    l[B[i]] -= 1
    if l[B[i]] == 0: del l[B[i]]
  if len(l)==0: print "YES"
  else: print "NO"

A=raw_input()
B=raw_input()
l={}
check(A,B)