Abstract. [...]
1. recursively sort suffixes beginning at positions i mod 3 != 0.
2. sort the remaining suffixes using the information obtained in
step one.
3. merge the two sorted sequences obtained in steps one and two.
主旨:ご当地の噂を元に各県の冷蔵庫を想像する。そうか!冷蔵庫か!