unittest
{
	assert( [ "a" ].parse.expand.solve == "vowel" );
	assert( [ "z" ].parse.expand.solve == "consonant" );
	assert( [ "s" ].parse.expand.solve == "consonant" );
}



import std.conv;
import std.range;
import std.stdio;
import std.typecons;

void main()
{
	stdin.byLineCopy.parse.expand.solve.writeln;
}

auto parse( Range )( Range input )
if( isInputRange!Range && is( ElementType!Range == string ) )
{
	auto c = input.front;
	return tuple( c );
}

auto solve( string c )
{
	if( c == "a" || c == "e" || c == "i" || c == "o" || c == "u" ) return "vowel";
	else                                                           return "consonant";
}
