Clean :)

I really like your solution. Cool!

There are issues in TypeScript version. For 10 to 14 return 10 but expected 20. Can anyone correct the testcases?

The description should have some defintion on cells adjacent rather than diagram. For me, the diagram was a bit confusing because ==> was pointing middle row. Even it can have some clues.

Creator should add more details to this problem. Even base testcase does not cover much.

I use sum() of list instead of len. But I have used a variable count whenever there is a difference in character between two string count will be append to list. by default count is 1

Like it! Good use of lambda

use xrange instead of range for better performance.

I have following problem

'(1, 2, 3)' should equal '(1,2,3)'

UPDATE: Solved. Thanks anyways

I like the use of ord('a') rather than harding coding 96. Congrats!