split data into multiple files

Hi,

I have a file with data in below format,

abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop

abcdefghijklmnop
abcdefghijklmnop

abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop

i need to create three files like

file1:

abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop

file2:

abcdefghijklmnop
abcdefghijklmnop

file3:

abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop
abcdefghijklmnop

is there any way you can suggest?

Thanks
Jumsheed