C11112331333132311331333133313331312111113112113313331323211232221   >>    C1111233133313231133133313331333131211111311211331333132321123222   <<    C11112331333132311331333133313331312111113112113313331323211232223   >>      C11112331333132311331333133313331312111113112113313331323211232222   >>