X = 3, Y = 5, T = 4
GCD(X, Y) = 1 so we know it is possible

0.  Starting state (X=0, Y=0, Z=0)
1.  Fill X with 3 units of water (X=3, Y=0, Z=0)
2.  Pour X into Z (X=0, Y=0, Z=3)
3.  Fill X with 3 units of water (X=3, Y=0, Z=3)
4.  Pour X into Y (X=0, Y=3, Z=3)
5.  Fill X with 3 units of water (X=3, Y=3, Z=3)
6.  Pour X into Y until Y is full (X=1, Y=5, Z=3)
7.  Pour X into Z (X=0, Y=5, Z=4)