function solve(x1, x2, y1, y2){
    let distance = (x1, y1, x2, y2) => Math.sqrt((x2-x1)**2 + (y2-y1)**2);

    console.log(`{${x1}, ${y1}} to {0, 0} is ${Number.isInteger(distance(x1, y1, 0, 0)) ? 'valid' : 'invalid'}`);
    console.log(`{${x2}, ${y2}} to {0, 0} is ${Number.isInteger(distance(x2, y2, 0, 0)) ? 'valid' : 'invalid'}`);
    console.log(`{${x1}, ${y1}} to {${x2}, ${y2}} is ${Number.isInteger(distance(x1, y1, x2, y2)) ? 'valid' : 'invalid'}`);
}