eeee eees eefe eese eesi efes effi effs efsi eiei eies eifs eise eiss esee eses esfs esie esis esse essi fees fefe feff fefi feie feis fese fess ffee ffff ffii ffss fief fies fife fiff fifi fiii fise fisi fiss fsfi fssf ieie iesi ifes ifis iies iiie iiii iiis iisi isee ises isie isis isse issf issi isss s-ii se-e se-f se-i se-s seef sees seff sefi seie seif seii seis sese sesi sess sfss sief sies sife siff sise sisi siss ssee sses ssis sssf sssi ssss