I saw you on ROAD today

I saw U on ROAD today.

U were looking SO fine,

Ur face SO divine,

Ur walk SO perfect.

My HEART started singing a Sweet Song:

WHO LET THE DOGS OUT!

1 missing in above

A B C D E F G H
I J K L M N O P
Q R S T U V W X
Y Z
.
.
.
1 missing in above
.
.
.
why are you reading again?
shame on you…!
In ABCD where comes 1.