F - Flowers Flourish from France

Time limit: 3 s
Memory limit: 256 MiB
Languages: C, C++, Java, Python, ... (details)

Fiona has always loved poetry, and recently she discovered a fascinating poetical form. Tautograms are a special case of alliteration, which is the occurrence of the same letter at the beginning of adjacent words. In particular, a sentence is a tautogram if all of its words start with the same letter.

For instance, the following sentences are tautograms:

  • Flowers Flourish from France
  • Sam Simmonds speaks softly
  • Peter pIckEd pePPers
  • truly tautograms triumph

Fiona wants to dazzle her boyfriend with a romantic letter full of this kind of sentences. Please help Fiona to check if each sentence she wrote down is a tautogram or not.

Input

Each test case is given in a single line that contains a sentence. A sentence consists of a sequence of at most $50$ words separated by single spaces. A word is a sequence of at most $20$ contiguous uppercase and lowercase letters from the English alphabet. A word contains at least one letter and a sentence contains at least one word. The last test case is followed by a line containing only a single character $\texttt{‘*’}$ (asterisk).

Output

For each test case output a single line containing an uppercase $\texttt{‘Y’}$ if the sentence is a tautogram, or an uppercase $\texttt{‘N’}$ otherwise.

Sample test(s)

Input
Flowers Flourish from France Sam Simmonds speaks softly Peter pIckEd pePPers truly tautograms triumph this is NOT a tautogram *
Output
Y Y Y Y N