from sys import stdin
def main():
    #入力
    readline=stdin.readline
    X=list(readline().strip())
    X.sort(reverse=True)
    
    s=set(X)
    if len(s)>=3:
        flag=True
    elif len(s)==2:
        no_zero=0
        for i in range(len(X)):
            if X[i]!="0":
                no_zero+=1
            elif X[i]=="0":
                flag=False
                break
            if no_zero>=2:
                flag=True
                break
    elif len(s)==1:
        flag=False

    if flag==False:
        print(-1)
    else:
        n=0
        for i in range(len(X)-1,-1,-1):
            if i==len(X)-1:
                n=X[i]
            else:
                if X[i]!=n:
                    X[i],X[i+1]=X[i+1],X[i]
                    break
    
        print("".join(X))

if __name__=="__main__":
    main()