Workset sorting in Role merge

HI,

I am performing a role merge of 2 navigational roles.

W - Workset

I - Iview

-

Role A

W1,W2,W3,W4,W5,I1,I2,I3

RoleB

W6,W7,W8,W9,I4,I5,I6

CURRENTLY output is

ROLE

W1,W2,W3,W4,W5,I1,I2,I3,W6,W7,W8,W9,I4,I5,I6

REQUIREMENT

After role merge my requirement is

ROLE

W1,W2,W3,W4,W5,W6,W7,W8,W9,I1,I2,I3,I4,I5,I6

Is there any way i can achieve this

Thanks