kǒu / chuāng / suī / rán / bù / dà / què / ràng / tā / shuō / huà / hé / chī / fàn / dōu / hěn / nán / shòu

口疮虽然不大，却让他说话和吃饭都很难受。

Although the mouth ulcer is small, it makes talking and eating uncomfortable.