Levels 1-5:
Hiragana characters (19 unique per level, all 76 in level 5)
Levels 6-10:
Katakana characters (19 unique per level, all 76 in level 10)
Levels 11-25:
Hiragana words (5 to 100 words) - ใใใ, ใญใ, ใในใ
Levels 26-40:
Katakana words (5 to 100 words) - ใณใผใใผ, ใใฌใ, ใซใกใฉ
Levels 41-60:
Mixed phrases (5 to 100 phrases) - ใใฏใใ, ใใใใจใ
Levels 61-80:
Sentences (3 to 40 sentences) - ใใใฏใใณใงใใ
Levels 81-90:
Paragraphs (1 to 5 paragraphs)
Levels 91-100:
Complete stories (up to 500 words)