Kuberako aya masoko yo mu bwoko bwa B yakozwe mubwinshi, afite ubukungu bwo kugura kuruta kongera gutunganya ibicuruzwa bitobora, hamwe no kurambirana, no gushyiraho inzira nyabagendwa. Bore yarangije kuboneka iraboneka kubwoko bwa “B” aho hub igaragarira kuruhande rumwe.