C212212121212113313221323131323131323132322331323132233132322132221   >>    C21221212121211331322132313132313132313232233132313223313232213222   <<    C212212121212113313221323131323131323132322331323132233132322132223   >>      C212212121212113313221323131323131323132322331323132233132322132222   >>