local s = io.read("*n")
local t = io.read("*n")
local c = io.read():gsub(" ", "")

local ans = (function ()
  if c == "<" then
    if s < t then
      return "YES"
    else
      return "NO"
    end
  end
  if c == ">" then
    if s > t then
      return "YES"
    else
      return "NO"
    end
  end
  if c == "=" then
    if s == t then
      return "YES"
    else
      return "NO"
    end
  end
end)()

print(ans)