def f( x , a )
	r = []
	count = 0
	x[ 0 ].length.times { |i|	
		if x[ 1 ][ i ] == a then
			r[ count ] = x[ 0 ][ i ]
			count += 1
		end
	}
	return r
end

x = [ 
      [ 'D' , 'A' , 'E' , 'C' , 'B' ] ,
      [ 70 , 85 , 60 , 45 , 70 ] 
    ]

a = 70
m = f( x , a )
if m.length != 0 then
	printf( "点数が%d点なのは" , a )
	m.length.times { |i|
		printf( "%sさん " , m[ i ] )
	}
	printf( "です\n" )
end