In the last lesson we went over マ三ムメモ — a simple lesson without any real gotchas. The R consonant in this lesson is simple too. While there is a pronunciation issue to think about, the characters are easy to tell apart.
RA RI RU RE RO-ラリルレロ
Just like in hiragana, this consonant has a catch. The R sounds like L.
Nothing to Look Out For
This lesson is straight forward. The characters are distinct enough. You may want to think about ロ (ro) and コ (ko), but these are easy to tell apart too.