SUBPROBLEMS

be bo el em er es lo me mo mu oe om op or os pe re so um up us

bel bes bob bop bos bro bub bum bur bus ebb elm els ems emu ers ess les leu lob lop lum mel mob mol mop mor mos mus obe oes ole oms ope ops orb ore ors ose our per pes pol pom pro pub pul pur pus reb rem rep res rob roe rom rub rue rum sel ser sob sol som sop sos sou sub sue sum sup ump upo ups urb urp use

bels berm bleb blob blub blue blur bobs bole bomb bops bore boss bros bubo bubs bulb bump bums burb burl burp burs buss ebbs elms emus epos eros euro less lobe lobs lope lops lore lose loss loup lour lube lues lump lums lure mels meou merl mess mobs mole mols mope mops more mors moss moue mule mure muse muss obes oles omer opes opus orbs ores orle oses ours perm peso pleb plum plus poem pole pols pome poms pore pose pour prom pros pubs pule puls pure purl purs puss rebs rems repo reps robe robs roes role romp roms rope rose roue roup rube rubs rues rule rump rums ruse sels sers slob sloe slop slub slue slum slur sobs sole sols some soms sops sorb sore soul soup sour sous spue spur subs suer sues sumo sump sums supe sups sure umbo umps urbs urps user uses