import std.algorithm, std.conv, std.range, std.stdio, std.string;
import std.math;      // math functions

void main()
{
  auto rd = readln.split.to!(long[]), x = rd[0], y = rd[1], z = rd[2];
  writeln(calc(x, y, z));
}

auto calc(long x, long y, long z)
{
  if (z == 0) return "ccW";
  if (x == 0 && y == 0) return "NO";

  if (x == 0) {
    if (z % y) return "NO";
    auto g = z/y;
    return 'w'.repeat.take(g).chain('C'.repeat.take(g-1)).to!string;
  }
  if (y == 0) {
    if (z % x) return "NO";
    auto g = z/x;
    return 'c'.repeat.take(g).chain('C'.repeat.take(g-1)).to!string;
  }

  foreach (a; -5000L..5001L) {
    writeln([x, y, z, a]);
    if ((z-a*x)%y) continue;
    auto b = (z-a*x)/y;

    if (a*2+b*2-1 > 10000) continue;

    if (a == 0)
      return 'w'.repeat.take(b).chain('C'.repeat.take(b-1)).to!string;
    if (b == 0)
      return 'c'.repeat.take(a).chain('C'.repeat.take(a-1)).to!string;

    if (a < 0)
      return 'w'.repeat.take(b).chain('C'.repeat.take(b-1))
        .chain('c'.repeat.take(-a)).chain('W'.repeat.take(-a)).to!string;
    if (b < 0)
      return 'c'.repeat.take(a).chain('C'.repeat.take(a-1))
        .chain('w'.repeat.take(-b)).chain('W'.repeat.take(-b)).to!string;

    return 'c'.repeat.take(a).chain('C'.repeat.take(a-1))
      .chain('w'.repeat.take(b)).chain('C'.repeat.take(b)).to!string;
  }

  return "NO";
}