#coding:utf-8

def main():
  s = list(input())
  i,j = (input().split(' '))
  ii = int(i)
  ij = int(j)
  si = s[ii]
  sj = s[ij]
  s[ii] = sj
  s[ij] = si
  print(''.join(s))


if __name__ == '__main__':
  main()