https://www.acmicpc.net/problem/11021
const fs=require('fs');
let ip=fs.readFileSync('/dev/stdin').toString().split('\n');
t=parseInt(ip[0]);
for(let i=1;i<=t;i++){
v=ip[i].split(" ").map(Number)
a=parseInt(v[0]);
b=parseInt(v[1]);
console.log("Case #%d: %d",i,a+b);
}