t,a,b = gets.split.map(&:to_i)
u,r = (t + a) / 2,(t + b) / 2
d,l = u - a,r - b
if d < 0 || l < 0
    puts "NO"
else
    puts "YES"
    t.times{|i|
        if u > 0
            print '^'
            u -= 1
        elsif d > 0
            print 'v'
            d -= 1
        else
            print ''
        end
        if t - i - 1 < l + r
            if r > 0
                print '>'
                r -= 1
            else
                print '<'
                d -= 1
            end
        end
        print "\n"
        }
end