process.stdin.resume();
process.stdin.setEncoding('utf8');
// Your code here!
(() => {
    S = S.match(/[^ｗ]+.*/)[0];
    let ar = S.split(/(ｗ+)/);
    let longest = 0;
    let resultIndex = [];
    console.log(ar);
    for(let i=0;i<ar.length;i++){
        let p = /[ｗ]+/;
        if(p.test(ar[i])){
            if(ar[i].length>longest){
                longest = ar[i].length;
                resultIndex=[];
                resultIndex.push(i);
            }else if(ar[i].length==longest){
                resultIndex.push(i);
            }
        }
    }
    for(i of resultIndex){
        console.log(ar[i-1]);
    }
})();