Buddha Abhidhamma - Ultimate Science - BuddhaNet

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Furthermore the 27 mahaggata cittas can be divided into
9 kusala cittas, 9 vipàka cittas and 9 kiriya cittas. These
groups of cittas are also referred to as 9 mahaggata kusala
cittas, 9 mahaggata vipàka cittas and 9 mahaggata kiriya
cittas. The 81 lokiya cittas can be divided into 12
akusala cittas, 17 kusala cittas, 32 vipàka cittas and 20 kiriya
cittas. The latter groups of cittas, being lokiya, are
respectively known as 17 lokiya kusala cittas, 32 lokiya
vipàka cittas and 20 lokiya kiriya cittas, respectively.
Now the 89 cittas (brief total) can be divided into 12
akusala cittas, 21 kusala cittas, 36 vipàka cittas and 20 kiriya
cittas. The 121 cittas (broad total) can be divided into
12 akusala cittas, 37 kusala cittas, 52 vipàka cittas and 20
kiriya cittas.
13 Division according to Vedanà (feeling)
There are five types of vedanà which are designated by
separate symbols in Chart No. 1 as:
i Somanassa (+) – joy, mental pleasure or mentally
agreeable feeling,
ii Domanassa (*) – mental displeasure or mentally
disagreeable feeling,
iii Sukha (v) – physical happiness
iv Dukkha (^) – physical pain
v Upekkhà (–) – indifference or neutral feeling.
In Chart No. 1 we shall notice that the 8 lokuttara cittas (i.e., 4
maggas and 4 phalas) are designated by the dual symbol +,
indicating that they may be associated with either somanassa
or upekkhà. The 40 lokuttara cittas can be, however, differentiated
by vedanà. We can make a table (see Table 1.1) for dividing
separate groups of cittas according to vedanà.