How to make orthographic metathesis rule

Hello everyone.

Now I’m making the Rejang script font. This script have orthographic metathesis rule. So when I type ꤳꤵꥇꤰ꥓, it should appear like

not

How to make orthographic metathesis rule like above in FontCreator? Thankyou!

It is something you can accomplish with mark to base.

But how?

Through the OpenType designer. Here you see how it is implemented in Noto:
Rejang.png

I think there is a misunderstanding here

What I mean is, how do I get the font to display (C1) (C2)VX when I type (C1)V (C2) X?

C1 = first consonant
C2 = second consonant
V = vowel sign
X = virama