[timecom]

var arrOne = [0, 9, 10, 11, 12, 20, 28, 32, 33, 47, 65, 69],
     arrTwo = [8, 14, 15, 16, 17, 18, 19, 31, 35, 36, 37, 58, 68, 73];
function foo(e, f) {
    var b = [],
        d = [f[0]];
    e.forEach(function(c,i) {
        a = d.slice(-1)[0];
        c > a && (arrTwo.some(function(b) {
            return b > c && d.push(b)
        }), c = e[i - 1], b.push(c))
    });
    b.push(e.slice(-1)[0]);
    return {
        one: b,
        two: d
    }
};
var res = foo(arrOne, arrTwo);
alert(res.one + '\n'+res.two)

Большое человеческое спасибо.