C212212121212113313223313133313221323133313231323132313231323231   >>    C21221212121211331322331313331322132313331323132313231323132323   <<    C212212121212113313223313133313221323133313231323132313231323233   >>      C212212121212113313223313133313221323133313231323132313231323232   >>