#include <stdio.h>

#define ARRLEN 1228800
#define uchar unsigned char
#define uint unsigned int

#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))

#define BLEND(dst, src, i, op) \
 (dst)[(i)] = op(dst, src, (i), (src)[(i)+3], (dst)[(i)+3]); \
 (dst)[(i)+1] = op(dst, src, (i)+1, (src)[(i)+3], (dst)[(i)+3]); \
 (dst)[(i)+2] = op(dst, src, (i)+2, (src)[(i)+3], (dst)[(i)+3]); \
 (dst)[(i)+3] = MULTIPLY_A(dst, src, (i)+3)

#define MULTIPLY_A(dst, src, i) (((dst)[i] * (src)[i]) >> 8)

#define MULTIPLY(dst, src, i, sa, da) (((((da)*(dst)[i]) >> 8) * (((sa)*(src)[i]) >> 8)) >> 8)

#define OVER(dst, src, i, sa, da) (( ((sa) * (src)[i]) >> 8 ) + ( ((255-(sa)) * ((da) * (dst)[i])) >> 16 ))

#define SCREEN(dst, src, i, sa, da) ( 255 - ( ( (255-( ((sa)*(src)[i]) >> 8 )) * (255-( ((da)*(dst)[i]) >> 8 )) ) >> 8 ) );

#define LIGHTEN(dst, src, i, sa, da) MAX( (sa)*(src)[i], (da)*(dst)[i] )

#define DARKEN(dst, src, i, sa, da) MIN( (sa)*(src)[i], (da)*(dst)[i] )

void multiply(uchar *dst, const uchar *src, uint len)
{
  uint i;
  for (i = 0; i<len; i+=4) {
    BLEND(dst, src, i, MULTIPLY);
  }
}

void over(uchar *dst, const uchar *src, uint len)
{
  uint i;
  for (i = 0; i<len; i+=4) {
    BLEND(dst, src, i, OVER);
  }
}

void screen(uchar *dst, const uchar *src, uint len)
{
  uint i;
  for (i = 0; i<len; i+=4) {
    BLEND(dst, src, i, SCREEN);
  }
}

void darken(uchar *dst, const uchar *src, uint len)
{
  uint i;
  for (i = 0; i<len; i+=4) {
    BLEND(dst, src, i, DARKEN);
  }
}

void lighten(uchar *dst, const uchar *src, uint len)
{
  uint i;
  for (i = 0; i<len; i+=4) {
    BLEND(dst, src, i, LIGHTEN);
  }
}

int main(int argc, char** argv)
{
  uchar a1[ARRLEN], a2[ARRLEN];
  uint i;

  fread(a1, 1, ARRLEN, stdin);
  fread(a2, 1, ARRLEN, stdin);

  for (i=0; i<20; i++) {
    multiply(a1, a2, ARRLEN);
    over(a1, a2, ARRLEN);
    lighten(a1, a2, ARRLEN);
    screen(a1, a2, ARRLEN);
    darken(a1, a2, ARRLEN);
  }

  fwrite(a1, 1, ARRLEN, stdout);

  return 0;
}