2. The storage medium according to claim 1 , characterized in that, in the new anchor attachment step, the character string of the matched range is set as a new anchor character string of the new anchor.
2. The storage medium according to claim 1 , characterized in that, in the new anchor attachment step, the character string of the matched range is set as a new anchor character string of the new anchor. 3. The storage medium according to claim 2 , characterized in that, in the new anchor attachment step, a combination character string in which the original anchor character string is combined with the character string of the matched range is generated as a new anchor character string of the new anchor.