def f( x )
        a = 1
        (1..x).each { |i|
                a = a * i
        }
        return a
end

def comb( n , r )
	return f( n ) / ( f( r ) * f( n-r ) )
end

x = 10
(1..x).each { |j|
	(1..j).each { |i|
		printf( "%dC%d=%d " , j , i , comb( j , i ) )
	}
	printf( "\n" )
}