Use a non deterministic finite-state automaton (FSA) engine from the TaskC00.
Create your own non deterministic FSA description to check whether the string
ends with "ab"

The alphabet is "a", "b", "C"

Read strings from the standard input.
If a string is accepted by the 
automaton, write YES, otherwise- write NO. 

POINTS: 4
DEADLINE: 2021-01-08 23:59:00
REMAINDER: 1/3