CHALLENGE #020

Decode the logic

1E in P

2E in D

3E in K

4E in L

Note :

1) P,D,K and L are friends. 

2) The words you find should be related to each other

For example : 

1) 1A in M means

1A in the word MARCH.

2) 2A in J means

2 A's in  the word JANUARY