#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000005
#define Inf64 4000000000000000001LL

int main(){
	long long x,y,z;
	cin>>x>>y>>z;
	if(abs(x-y)==z){
		cout<<3<<endl;
		cout<<x<<' '<<z<<' '<<y<<endl;
		return 0;
	}
	if(x==y){
		cout<<4<<endl;
		cout<<x<<' '<<z<<' '<<z<<' '<<y<<endl;
		return 0;
	}
	
	if(z*2==x+y){
		cout<<4<<endl;
		if(z-x>=0){
			cout<<x<<' '<<z-x<<' '<<z<<' '<<y<<endl;
		}
		else{
			cout<<x<<' '<<z<<' '<<z-y<<' '<<y<<endl;
		}
		return 0;
	}
	assert(false);
	cout<<-1<<endl;
	return 0;
}