preprocess all prime numbers upto 10 ^ 5
sieve ( ) ; NEW_LINE print ( phi ( 11 ) ) ; NEW_LINE print ( phi ( 21 ) ) ; NEW_LINE print ( phi ( 31 ) ) ; NEW_LINE print ( phi ( 41 ) ) ; NEW_LINE print ( phi ( 51 ) ) ; NEW_LINE print ( phi ( 61 ) ) ; NEW_LINE print ( phi ( 91 ) ) ; NEW_LINE print ( phi ( 101 ) ) ; NEW_LINE