\section*{Test result} \begin{itemize} \item[orig] ABCDEFG tuvwxyz \item[len] 15 \item[1] A \item[2] AB \item[3] ABC \item[4] ABCD \item[5] ABCDE \item[6] ABCDEF \item[7] ABCDEFG \item[orig] {AB}CDEFG tuvwx{yz} \item[len] 15 \item[1] {A} \item[2] {AB} \item[3] {AB}C \item[4] {AB}CD \item[5] {AB}CDE \item[6] {AB}CDEF \item[7] {AB}CDEFG \item[orig] {{AB}CD}EFG tuv{wx{yz}} \item[len] 15 \item[1] {{A}} \item[2] {{AB}} \item[3] {{AB}C} \item[4] {{AB}CD} \item[5] {{AB}CD}E \item[6] {{AB}CD}EF \item[7] {{AB}CD}EFG \item[orig] ÅÇÈÎØÜÝ~åçèîøüý \item[len] 15 \item[1] Å \item[2] ÅÇ \item[3] ÅÇÈ \item[4] ÅÇÈÎ \item[5] ÅÇÈÎØ \item[6] ÅÇÈÎØÜ \item[7] ÅÇÈÎØÜÝ \item[orig] {{ÅÇ}ÈÎ}ØÜÝ~åçè{îø{üý}} \item[len] 15 \item[1] {{Å}} \item[2] {{ÅÇ}} \item[3] {{ÅÇ}È} \item[4] {{ÅÇ}ÈÎ} \item[5] {{ÅÇ}ÈÎ}Ø \item[6] {{ÅÇ}ÈÎ}ØÜ \item[7] {{ÅÇ}ÈÎ}ØÜÝ \end{itemize} \endinput