/*
ns: Token
expectation: Pass
*/

"{}"
" {} "
"{}d"
"{}D"
"d{}"
"D{}"
"D{}D"
"{}{}"
"D{}{}D"
"D{}{}"
"{}{}D"
"D{}D{}D"
"{{}}"
"}}"
"{{"
"}}{{"
"{{}"
"{}}"
"{"
"}"