-up m-o m-r mmm mmo mmp mmr mmu mom moo mop mor mou mpm mpo mpp mpr mpu mrm mro mrp mrr mru mum mup mur muu om- omm omo omp omr omu oo- oom ooo oop oor op- opm opo opp opr or- orm oro orp orr oru ou- oum ouo oup our p-p pmm pmo pmp pmr pmu pom poo pop por pou ppm ppo ppp ppr ppu prm pro prp prr pru pum pup pur puu rmm rmo rmp rmr rom roo rop ror rou rpm rpo rpp rpr rpu rrm rrp rrr rru rum ruo rup rur ruu um- umm umo ump umr umu uom uoo uop uor up- upm upo upp upr upu ur- urm uro urp urr uru uum uur uuu