POXVIRUSES

er es ex is oe oi op or os ox pe pi re si so up us xi xu

ers ess ire oes ope ops ore ors ose our per pes pie pis piu pix poi pox pro psi pur pus rei rep res rev rex rip roe rue sei ser sex sip sir sis six sop sos sou sox sri sue sup upo ups urp use vex vie vis voe vox xis

epos eros euro expo ires opes opus ores oses ours over oxes peri perv peso pier pies piso piss pois pore pose pour prex pros psis pure puri purs puss reis repo reps revs ripe rips rise rive roes rope rose roue roup roux rove rues ruse seis sers sipe sips sire sirs sops sore sori soup sour sous spiv spue spur sris suer sues supe sups sure urps user uses vier vies vise voes