In CFOP, I know two$-$look oll pll$,$ I wanna know what two$-$look oll or any easy technique that can always make me get case like oll$21,$ I only want to get oll $21.$ So it$$s not about using like FURU$$R$$F$$ or tell me RUR$$URU$2$R$.$ These algs certainly will get cross on the top, but not case like oll$21,$ I only wanna get oll $21.$ So if you have the alg or some easy technique that can make me always get case look like oll$21$ not other case that have cross. It is what I want to know.