Split members of one cell according to string lenght, cut and paste other column

[wali]

Hello,
I have got a large wordlist containing over 400 000 words and millions of meanings and explinations. Col. A cotains of words and col. B contains of meanings and explinations(seperated by ";"). Now i want to split column B into two columns. Those members which are longer than 30 Charachters should be cut from col. B and pasted in corresponding cell of column K.
Please, refer to the attachment as simplified example.

thank you very much for each assistance in advance.