import std.stdio, std.conv, std.string, std.array, std.range, std.algorithm, std.container;
import std.math, std.random, std.bigint, std.datetime, std.format;
void main(string[] args){ if(args.length > 1) if(args[1] == "-debug") DEBUG = 1; solve(); }
void log()(){ writeln(""); } void log(T, A ...)(T t, lazy A a){ if(DEBUG) write(t, " "), log(a); } bool DEBUG = 0; 
string rstring(){ static string[] ss; while(!ss.length) ss = readln.chomp.split; string res = ss[0]; ss.popFront; return res; }
T rtype(T)(){ return rstring.to!T; } alias rint = rtype!int, rlong = rtype!long, rreal = rtype!real;
T[] rtypes(T)(int n){ return n.iota.map!(i => rtype!T()).array; } alias rint = rtypes!int, rlong = rtypes!long, rreal = rtypes!real;
T[][] rtypess(T)(int n, int m){ return n.iota.map!(i => rtypes!T(m)).array; } alias rint = rtypess!int, rlong = rtypess!long, rreal = rtypess!real;

// ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- //

void solve(){
	char[] x = rstring.to!(char[]);
	
	int[] ans = x.map!(to!int).array;
	ans.sort!"a>b"();
	
	if(ans[0] == '0' || ans[1] == '0'){ "-1".writeln; return; }
	
	auto i = ans.length - 1; while(i > 0 && ans[i] == ans[$ - 1]) i --;
	if(ans[i] == ans[$ - 1]){ "-1".writeln; return; }
	else{ int z = ans[$ - 1]; ans[$ - 1] = ans[i]; ans[i] = z; }
	
	ans.map!(to!char).array.writeln;
	
}