function solve(input1) {
    input = input1.map(Number);
    let pointA = {x:input[0], y:input[1]}
    let pointB = {x:input[2], y:input[3]};
    let pointZero = {x:0, y:0};
    function distance(pointA, pointB) {
        return  Math.sqrt(Math.pow(pointA.x-pointB.x) + Math.pow(pointA.y-pointB.y));
    }
        let a = distance(pointA,pointZero);
    console.log(a);

    function isNum(distance, pointA, pointB) {
        if(isNaN(distance)){
            console.log(`{${pointA.x},${pointA.y}} to {${pointB.x}, ${pointB.y}} is invalid`)
        }
        else{
            console.log(`{${pointA.x},${pointA.y}} to {${pointB.x}, ${pointB.y}} is valid`)
        }
    }

    isNum(distance(pointA, pointZero), pointA, pointZero);
    isNum(distance(pointB, pointZero), pointB, pointZero);
    isNum(distance(pointA, pointB), pointA, pointB);

}
solve(['3', '0', '0', '4']);