using System;

public class Program

{

    public static void Main()

    {

        // ["cat", "mones", "moses", "fi"]

        // ['c', 'm', 'o', 's', 'f']

    }

    private static bool IsListAlpabeticallySorted(string[] words, char[] alphabet) {

        for (int i = 0; i < words.Length -1; i++) {

            if (!IsPairSorted(words[i], words[i+1], alphabet)) {

                return false;

            }

        }

            return true;

    }

    private static bool IsPairSorted(string wordA, string wordB, char[] alphabet) {

        bool wordAisShorter =  wordA.Length < wordB.Length;

        int shorterWordLength = wordAisShorter ? wordA.Length : wordB.Length;

        for (int i = 0; i < shorterWordLength; i++) {

            if (!IsFirstLetterFirstInAlphabet(wordA[i], wordB[i], alphabet)) {

                return false;

            }

        }

        return wordAisShorter;

    }

    private static bool IsFirstLetterFirstInAlphabet(char a, char b, char[] alphabet) {

        int indexA = -1;

        int indexB = -1;

        for(int i = 0; i < alphabet.Length; i++) {

            if (alphabet[i] == a) {

                indexA = i;

            }

            if (alphabet[i] == b) {

                indexB = i;

            }

        }

        if (indexA == -1 || indexB == -1) {

            throw new Exception("invalid letter");  

        }

        return indexA < indexB;

    }

}