#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char s[100004];
int h[64];
main(){
	int n;
	n=read(0,s,100001);
	for(char*p=s;*p!=10;++p){
		++h[*p];
	}
	char*p=s,*q;
	for(int j=58;--j>=48;){
		int k=h[j];
		if(k){
			memset(q=p,j,k);
			p+=k;
		}
	}
	if(q==s || q==s+1 && *q==48){
		write(1,"-1",2);
	}else{
		int t=*q;
		*q=q[-1];
		q[-1]=t;
		write(1,s,n);
	}
	_exit(0);
}