Train X runs from A to D, Train Y from B to D, Train Z from C to D.
E, F, G and H are four intermediate stations/ places enroute X, Y and Z. Find X, Y, Z, A, B, C, D, E, F, G and H given:

a. X and Y share common slot between E and F
b....
more...

All three X, Y, and Z have a common halt in F
c. All three have same arrival time at D
d. X and Y share same route but not necessarily same timings between F and D
e. X and Y now halt at G but earlier used to halt at H
f. All three are weeklies from different zone but don't necessarily run on different days
g. A and B may or may not be same
h. All 3 run for 1500km+
i. G is a bypass station created to avoid congestion at H
j. E - F - G are halts in same sequence while going to D