Can somebody please please help me on Spiltting the package name in Ruby

Can somebody please please help me on splitting the below name in Ruby

package= AB-JACK_ABCD_gt_dkd_3-2-2-1-3.2.2.1-GIT.x86_32.exe

fullname= package.spilt
version= package.spilt
release= package.spilt

The following output need to be printed   
puts fullname >> ABCD_gt_dkd_3-2-2-1  
puts version >> 3.2.2.1  
puts release >> GIT  

Thanks in advance