And just take one 777, for example, to try to see where it'll fly. [I'm assuming there are only 17 777s, as I don't know what the last one may be doing.]

Let's start at 11:55p local time in Tel Aviv. CO 91
TLV 11:55p - EWR 4:45a

Early in the morning, this is the only 777 at EWR. It will definitely go on CO 9:
EWR 11:10a - NRT 1:50p

Since this bird arrives NRT before the one from IAH, it should take the first departure, which is CO 6:
NRT 3:40p - IAH 1:45p

From Houston, it may go to LGW or CDG later that afternoon, and so on. But assume that it arrives on schedule as the 1st bird to come back to IAH that day, then it'll may do CO 34:
IAH 3:50p - LGW 6:55a

Being the second LGW arrival that morning, it should do CO 19:
LGW 10:30a - EWR 1:25p

Being the 3rd plane to arrive back from Europe (not including CO 91 from TLV), it might take the 3rd departure after NRT, which is the shorthaul to Houston, CO 51:
EWR 4:20p - IAH 7:30p

And so on... Anyways, many assumptions are made here. Just an example of what a particular plane may do over a few days' time.