L1 — True friends (look & sound like Latin)
АAH
КK
МM
ОOH
ТT
L2 — False friends (look Latin, sound different)
ВBV
НHN
РPR
СCS
УYOO
ХXKH
L4 — Five new letters
ИEE
ЯYA
ЛL
БB
ГG
L5 — Street signs letters
ПP
ЕYE
ДD
Ьsoft
ЦTS
L6 — Hissing sounds
ШSH
ЖZH
ЗZ
ЩSHCH
ЧCH
L7 — The final seven
ЙY
ФF
ЭE
ЮYU
ЁYO
ЫŸ
Ъhard