// minray > minray.ppm
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
typedef int i;
typedef float f;
struct v {
  f x, y, z;
  v operator+(v r) { return v(x + r.x, y + r.y, z + r.z); }
  v operator*(f r) { return v(x * r, y * r, z * r); }
  f operator%(v r) { return x * r.x + y * r.y + z * r.z; }
  v() {}
  v operator^(v r) {
    return v(y * r.z - z * r.y, z * r.x - x * r.z, x * r.y - y * r.x);
  }
  v(f a, f b, f c) {
    x = a;
    y = b;
    z = c;
  }
  v operator!() { return *this * (1 / sqrt(*this % *this)); }
};
i G[] = {247570, 280596, 280600, 249748, 18578, 18577, 231184, 16, 16};
f R() { return (f)rand() / RAND_MAX; }
i T(v o, v d, f &t, v &n) {
  t = 1e9;
  i m = 0;
  f p = -o.z / d.z;
  if (.01 < p)
    t = p, n = v(0, 0, 1), m = 1;
  for (i k = 19; k--;)
    for (i j = 9; j--;)
      if (G[j] & 1 << k) {
        v p = o + v(-k, 0, -j - 4);
        f b = p % d, c = p % p - 1, q = b * b - c;
        if (q > 0) {
          f s = -b - sqrt(q);
          if (s < t && s > .01)
            t = s, n = !(p + d * t), m = 2;
        }
      }
  return m;
}
v S(v o, v d) {
  f t;
  v n;
  i m = T(o, d, t, n);
  if (!m)
    return v(.7, .6, 1) * pow(1 - d.z, 4);
  v h = o + d * t, l = !(v(9 + R(), 9 + R(), 16) + h * -1),
    r = d + n * (n % d * -2);
  f b = l % n;
  if (b < 0 || T(h, l, t, n))
    b = 0;
  f p = pow(l % r * (b > 0), 99);
  if (m & 1) {
    h = h * .2;
    return ((i)(ceil(h.x) + ceil(h.y)) & 1 ? v(3, 1, 1) : v(3, 3, 3)) *
           (b * .2 + .1);
  }
  return v(p, p, p) + S(h, r) * .5;
}
i main() {
  printf("P6 512 512 255 ");
  v g = !v(-6, -16, 0), a = !(v(0, 0, 1) ^ g) * .002, b = !(g ^ a) * .002,
    c = (a + b) * -256 + g;
  for (i y = 512; y--;)
    for (i x = 512; x--;) {
      v p(13, 13, 13);
      for (i r = 64; r--;) {
        v t = a * (R() - .5) * 99 + b * (R() - .5) * 99;
        p = S(v(17, 16, 8) + t,
              !(t * -1 + (a * (R() + x) + b * (y + R()) + c) * 16)) *
                3.5 +
            p;
      }
      printf("%c%c%c", (i)p.x, (i)p.y, (i)p.z);
    }
}