Raw data of Fig. 2(a) and Fig. 2(b) have same format: 

column 1: Raman shift (cm-1) 
column 2: Intensity (counts per second)  
(white space separator)

Fig 2(a)
Sequence is "ReS2 bottom2" to "ReS2 bottom224" from top to bottom of the figure

Fig 2(b)
Sequence is "ReS2 top" to "ReS2 top24" from top to bottom of the figure