import sys
input=lambda: sys.stdin.readline().rstrip()
S=input()
i,j=map(int,input().split())
if i>j:
  i,j=j,i
ans=""
for n in range(len(S)):
  if n==i:
    ans+=S[j]
  elif n==j:
    ans+=S[i]
  else:
    ans+=S[n]
print(ans)