make easier to type 連濁

[h-youhei]

To produce けげ, now it has to be typed
press カ＋エ、leave カ＋エ、pressエ＋カ、leave エ＋カ.
This is easier to type.
press カ＋エ、leave カ、press カ、leave カ＋エ

Incidentally,
press イ＋サ（イ first）、leave イ、press ア、produce じざ.

[h-youhei]

This makes order of release kana chord restricted.