Release shift (L/R) and tap HIRA (yellow button) will enter hiragana mode, which is your screenshot. You can type "あいしてる" (I love you) there.
The 4th screen is when you tap SHIFT (hold L/R) again in hiragana, a.k.a hiragana supplement mode.
You can type "げっぷ" (burp) or "じゅっぽ" (ten steps) in this keyboard.
That's all! Nothing useful amiss.
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