func groupAnagrams(strs []string) [][]string {
    res:=map[[26]int][]string{}

    for _,s:=range strs {
        count:=[26]int{}

        for _,c:=range s{
            count[c-'a'] +=1
        }
        res[count]=append(res[count],s)
    }

    frs:=[][]string{}
    for _,v:=range res {
        frs = append(frs,v)
    }
    return frs
}