okay. Let me clarify the tricks.
Here, the value of A = 1, B = 2, C = 3 etc.
That's how A+A = B or 1+1 = 2
B+B = D or 2+2 = 4
A+D = E or 1+4 = 5
B+D+E = K or 2+4+5 = 11