preprocess all prime numbers upto 10 ^ 5
sieve ( ) ; print ( phi ( 11 ) . " STRNEWLINE " ) ; print ( phi ( 21 ) . " STRNEWLINE " ) ; print ( phi ( 31 ) . " STRNEWLINE " ) ; print ( phi ( 41 ) . " STRNEWLINE " ) ; print ( phi ( 51 ) . " STRNEWLINE " ) ; print ( phi ( 61 ) . " STRNEWLINE " ) ; print ( phi ( 91 ) . " STRNEWLINE " ) ; print ( phi ( 101 ) . " STRNEWLINE " ) ; ? >