public static bool IsAnagram(string s, string t)
{
if (s.Length != t.Length)
{
return(false);
}
var alphabets = new short[26];
for (var i = 0; i < s.Length; i++)
{
alphabets[s[i] - 'a']++;
alphabets[t[i] - 'a']--;
}
return(!alphabets.Any(alphabet => alphabet > 0));
}