C212212121212113313221323131323131323132322331323132233132223231   >>    C21221212121211331322132313132313132313232233132313223313222323   <<    C212212121212113313221323131323131323132322331323132233132223233   >>      C212212121212113313221323131323131323132322331323132233132223232   >>