t,a,b=gets.split.map &:to_i
s=[""]*((s=t-b)%2)+[?<,?>]*(s/2)+[?>]*b
puts t<a||t<b||t+a+b<2?:NO:[:YES]+(0...t).map{|i|(i<a ? ?^:i<t-(t-a)%2?"^v"[(i-a)%2]:"")+s[i]}