def change(moji, nums) -> str:
    return moji[:int(nums[0])] + moji[int(nums[1])] \
         + moji[int(nums[0]) + 1:int(nums[1])] + moji[int(nums[0])] \
         + moji[int(nums[1]) + 1:]

inp_str = input()
irekae = list(input().split())
print(change(inp_str, irekae))