Originally Posted by: ofirozThank you about the answer, the answer help we to understand where i standing and why it's look familiar in one side but still not familiar in other side.

I have one more question when i see cords that end in 'm' (ex. Am) it's equal to (ex. A minor) and when i see cord without other latter it's major, i ask this base on the cord from the beginner videos (E, G, A minor etc.).

Hey Ofiroz,
Christopher already answered your other question, but I'll answer the last one for you. You are right, if there's nothing after the chord then it's a major chord.

Have a great weekend, and best of luck in your learning.