local mfl, mce = math.floor, math.ceil
local mab = math.abs
local function getgcd(x, y)
  while 0 < x do
    x, y = y % x, x
  end
  return y
end

local function bezout_eq(a, b, Z)
  if b == 0 then
    return Z, 0
  end
  local y, x = bezout_eq(b, a % b, Z)
  y = y - mfl(a / b) * x
  return x, y
end

local function triplediv(xmin, xmax, func)
  local left_v, right_v = func(xmin), func(xmax)
  while 1000 < xmax - xmin do
    local xmid1, xmid2 = mfl((xmin * 2 + xmax) / 3), mfl((xmin + xmax * 2) / 3)
    local mid_v1, mid_v2 = func(xmid1), func(xmid2)
    if left_v > mid_v1 then
      if mid_v2 > right_v then
        xmin = xmid2
        left_v = mid_v2
      elseif mid_v1 > mid_v2 then
        xmin = xmid1
        left_v = mid_v1
      else
        xmax = xmid2
        right_v = mid_v2
      end
    else
      if mid_v2 < right_v then
        xmax = xmid1
        right_v = mid_v1
      elseif mid_v1 < mid_v2 then
        xmin = xmid1
        left_v = mid_v1
      else
        xmax = xmid2
        right_v = mid_v2
      end
    end
  end
  -- return (xmin + xmax) / 2
  return xmin, xmax
end


local x, y, z = io.read("*n", "*n", "*n")
if x == 0 and y == 0 then
  if z == 0 then
    print("c")
  else
    print("NO")
  end
elseif x == 0 then
  if z == 0 then
    print("c")
  elseif z % y == 0 then
    local cnt = mfl(z / y)
    if cnt * 2 - 1 <= 10000 then
      io.write(string.rep("w", cnt))
      io.write(string.rep("C", cnt - 1))
      io.write("\n")
    else
      print("NO")
    end
  else
    print("NO")
  end
elseif y == 0 then
  if z == 0 then
    print("w")
  elseif z % x == 0 then
    local cnt = mfl(z / x)
    if cnt * 2 - 1 <= 10000 then
      io.write(string.rep("c", cnt))
      io.write(string.rep("C", cnt - 1))
      io.write("\n")
    else
      print("NO")
    end
  else
    print("NO")
  end
else
  local gcd = getgcd(x, y)
  if z % gcd ~= 0 then
    print("NO") os.exit()
  end
  x, y, z = mfl(x / gcd), mfl(y / gcd), mfl(z / gcd)
  local a1, b1 = bezout_eq(x, y, z)
  -- print(a1, b1)
  if 0 < a1 then
    local q = mce(a1 / y)
    qmin, qmax = triplediv(0, q, function(Q) return mab(a1 - y * Q) + mab(b1 + x * Q) end)
    local ca, cb, v = a1, b1, mab(a1) + mab(b1)
    for iq = qmin, qmax do
      local vv = mab(a1 - y * iq) + mab(b1 + x * iq)
      if vv < v then
        ca, cb, v = a1 - y * iq, b1 + x * iq, vv
      end
    end
    a1, b1 = ca, cb
  elseif 0 < b1 then
    local q = mce(b1 / x)
    qmin, qmax = triplediv(0, q, function(Q) return mab(a1 + y * Q) + mab(b1 - x * Q) end)
    local ca, cb, v = a1, b1, mab(a1) + mab(b1)
    for iq = qmin, qmax do
      local vv = mab(a1 + y * iq) + mab(b1 - x * iq)
      if vv < v then
        ca, cb, v = a1 + y * iq, b1 - x * iq, vv
      end
    end
    a1, b1 = ca, cb
  end
  -- print(a1, b1)
  z = 1

  local cnt = (mab(a1) + mab(b1))
  if cnt * 2 - 1 <= 10000 then
    if a1 == 0 then
      io.write(string.rep("w", b1))
      io.write(string.rep("C", b1 - 1))
      io.write("\n")
    elseif b1 == 0 then
      io.write(string.rep("c", a1))
      io.write(string.rep("C", a1 - 1))
      io.write("\n")
    elseif 0 <= a1 and 0 <= b1 then
      io.write(string.rep("c", a1))
      io.write(string.rep("w", b1))
      io.write(string.rep("C", b1 - 1))
      io.write(string.rep("C", a1))
      io.write("\n")
    elseif a1 <= 0 then
      io.write(string.rep("c", -a1))
      io.write(string.rep("w", b1))
      io.write(string.rep("C", b1 - 1))
      io.write(string.rep("W", -a1))
      io.write("\n")
    else
      io.write(string.rep("w", -b1))
      io.write(string.rep("c", a1))
      io.write(string.rep("C", a1 - 1))
      io.write(string.rep("W", -b1))
      io.write("\n")
    end
  else
    print("NO")
  end
end