from pprint import pprint

def main():
    s=input()
    i,j=map(int,input().split())
    l=[]
    for k in range(len(s)):
        l.append(s[k])
    tmp=l[i]
    l[i]=l[j]
    l[j]=tmp
    print(*l,sep="")
    
    
if __name__ == "__main__":
    main()