genre de rendu monnaie

 noteTypes = readline().split(' ').map(a=>1*a).reverse();
 N = parseInt(readline());
let myMap = new Map();
for(let n of noteTypes)
{
    myMap.set(n,0);
}
while(N != 0)
{
    for(let x of noteTypes)
    {
        //console.log('ici',x)
        while(N >= x)
        {
            N -= x;
            myMap.set(x,myMap.get(x)+1);
        }
    }
}
r = '';
for (var [cle, valeur] of myMap)
{
    if(valeur != 0)
        r += valeur + 'x' + cle+ ' ';
}
console.log(r.trim());