C212212121212113313221323131323133313132333132322132321123232321   >>    C21221212121211331322132313132313331313233313232213232112323232   <<    C212212121212113313221323131323133313132333132322132321123232323   >>      C212212121212113313221323131323133313132333132322132321123232322   >>