Table 2.

State-change action matrix.

State	Input string
	“NO”	Disease	Time
0	N/Aa	1. Print(Found a disease. Hoping for it to be followed by a time since when disease existed.) 2. Update prev_disease = <disease>.	Print(Warning: Found a time unit before finding a disease)
1	Print(Disease Name followed by NO. Not according to how it should be)	1. Record <prev_disease, No time>. 2. Print(Warning: prev_disease was not followed by a time.) 3. Update prev_disease = <disease>	1. Record<prev_disease, <time>>. 2. Print(Successfully detected disease and time since when). 3. Update prev_disease = NULL.
2	Print(Error: Found two consecutive NOs)	Print(Detected a “NO Disease statement. Ignoring and not recording.)	Print(Found a time unit after NO. Something wrong)

^aN/A: not applicable.