str = gets.split
t = str[0].to_i
tx = str[1].to_i
ty = str[2].to_i
cx = 0
cy = 0
trace = Array.new
count = 0
d = (tx > ty) ? tx : ty
diff = t - d
if diff < 0
    puts "NO"
    exit
end
(diff / 2).times do
    trace.push(">")
    trace.push("<")
    count += 2
end
if diff % 2 == 1
    if tx > 0 && ty > 0
        if tx > ty
            trace.push("^")
            cy += 1
        else
            trace.push(">")
            cx += 1
        end
    elsif tx == 0 && ty > 0
        trace.push(">")
        cx += 1
    elsif tx > 0 && ty == 0
        trace.push("^")
        cy += 1
    else
        trace.delete_at(trace.length - 1)
        trace.delete_at(trace.length - 1)
        trace.push("^")
        trace.push(">")
        trace.push("v<")
    end
    count += 1
end
while count < t do
    s = ""
    if cx < tx
        s += ">"
        cx += 1
    elsif cx > tx
        s += "<"
        cx -= 1
    end
    if cy < ty
        s += "^"
        cy += 1
    elsif cy > ty
        s += "v"
        cy -= 1
    end
    trace.push(s)
    count += 1
end
if cx == tx && cy == ty
    puts "YES"
    puts trace
else
    puts "NO"
end