local ior = io.input()
local h, w, n = ior:read("*n", "*n", "*n", "*l")
local way, pos = {}, {}
local str = ""
for i = 1, n do
  str = ior:read()
  local a, b = str:match("(%w) (%d+)")
  way[i], pos[i] = a, tonumber(b)
end
local curcol, currow = 0, 0
for i = n, 1, -1 do
  if(way[i] == "C") then
    if(curcol == pos[i]) then
      currow = currow - 1
      if(currow == -1) then currow = h - 1 end
    end
  else
    if(currow == pos[i]) then
      curcol = curcol - 1
      if(curcol == -1) then curcol = w - 1 end
    end
  end
end
print((curcol + currow) % 2 == 1 and "black" or "white")