Fig. 4

Finite state transducer mapping all weekdays to their index number (monday =1, tuesday =2,...). Integer labels are not shown on edges with zero weight. Adding weights along the path spelled by the letters of the word Thursday, from the initial state on the left (indicated by a triangle) to the final state on the right (indicated by a double circle), yields 2+1+1=4. So, Thursday is the fourth day in the week