The plurality of distribution devices distribute {HEAD ~ picture data} according to {TAIL ~ the instruction}, and the plurality of receiving devices receive the picture data according to the instruction 
The plurality of distribution devices distribute { HEAD ~ picture data } according to { TAIL ~ the instruction } , and the plurality of receiving devices receive the picture data according to the instruction
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH