string pangrams(string s) {
    vector<int>alphabetCnt(26,0);
    for(int i=0;i<s.size();i++){
        if(s[i]!=' '&&islower(s[i]))
        alphabetCnt[(int)s[i]-97]++;
        else if(s[i]!=' '&&isupper(s[i]))
        alphabetCnt[(int)s[i]-65]++;
    }
    for(int i=0;i<26;i++){
        if(alphabetCnt[i]==0)
        return "not pangram";
    }
    return "pangram";
}