regex - Removing contents of bracelets -

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we have free text: 

sal{del{rf}ghladfs}wds{w12rf}qq

output should be: 

salwdsqq

please share various approaches if possible. example : lapply, gsub, for/while loop, grep

this works in r

string1 <- "sal{del{rf}ghla}dfs}wds{w12rf}qq" string2 <- gsub("{[^{}}]*}", "", string1, perl = true) string3 <- gsub("{.*}", "", string2, perl = true) string3

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