public static int CountAnagrams(IList <string> input)
{
var count = 0;
foreach (var line in input)
{
var words = line.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
var wordSet = new HashSet <string>(words);
var wordCount = words.Length;
if (wordCount != wordSet.Count)
{
continue;
}
var letterizedWords = words.Select(word => new List <char>(word)).ToArray();
bool valid = true;
foreach (var word in letterizedWords)
{
var otherWords = new HashSet <string>(wordSet);
otherWords.ExceptWith(new[] { new string(word.ToArray()) });
var combinations = new Permutations <char>(word);
if (combinations.Any(c => otherWords.Contains(new string(c.ToArray()))))
{
valid = false;
break;
}
}
if (valid)
{
count += 1;
}
}
return(count);
}
