Here is one easy way of many: 

   $prot = "HKTTLDSSRTTTTAABNNRFGHGHGYYH";
   say for/.{3}/g;

[download]

Says: 

HKT
TLD
SSR
TTT
TAA
BNN
RFG
HGH
GYY

[download]

In reply to Re: split function by hbm
in thread split function by Anonymous Monk

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