Guys help me in this statement. unable to understand it properly....!

Question

Q ) Count subsequences of type a^i, b^j, c^k .

Input : abbc
Output : 3

How this Subsequences are coming > abc, abc and abbc

Subsequence series is confusing me alot .

Can anyone explain it here...?

Answer 1

It need more details..atleast for me! Any other examples..?
abc, abc, abbc, all output : 3
a^i what is ^ and i in task? Can you share some more details..

Answer 2

abcabc

abc
abc..c
ab...c
ab..bc
a...bc
a..abc
...abc