We took a sheet of paper with random letters, and we asked people to find pairs of letters that were identical next to each other.
Хүмүүст үсэг бичсэн цааснуудыг өгөөд тэдгээрээс адил үсэгтэйг  өөр нэгийг хайж олох даалгавар өгсөн.