STUDY
4 3 2 1 0
0 1 2 3 4

Overlap between two word paths:
CLASS: C(0,0) L(1,1) A(2,2) S(3,3) S(4,4)  
STUDY: S(4,0) T(3,1) U(2,2) D(1,3) Y(0,4) 
