If it is possible to make only one seven letter meaningful English word with the 1^st, 4^th, 5^th, and 7^th letter of the word PRIORITY and 3^rd, 5^th, and 6^th letter of the word SECTOR, which of the following will be the first letter from left of that word? If no such word can be made give ‘X’ as the answer and if more than one such word can be made give ‘Y’ as the answer.