D121213233313221323133313221323132333132333131313113313232211211   >>    D12121323331322132313331322132313233313233313131311331323221121   <<    D121213233313221323133313221323132333132333131313113313232211213   >>      D121213233313221323133313221323132333132333131313113313232211212   >>