bool detectCapitalUse(string word) {
if(word[0]>='A' && word[0] <='Z')
if(word.size()<=2) return true;
if(word[1]>='A' && word[1]<='Z')
for(int i=2;i<word.size();i++)
if(word[i]>='a' && word[i]<='z') return false;
for(int i=2;i<word.size();i++)
if(word[i]>='A' && word[i]<='Z') return false;
if(c>='A' && c<='Z') return false;