C1212121231123232233131323223313231333132322133313132313231312321   >>    C121212123112323223313132322331323133313232213331313231323131232   <<    C1212121231123232233131323223313231333132322133313132313231312323   >>      C1212121231123232233131323223313231333132322133313132313231312322   >>