How can I create a hidden variable?

I have the following hidden variable:

Hidden_Edu [S]
1. Small
2. Medium
3. Large

And I want to assign it to categories based on Q1
1. Small: Q1=1-4
2. Medium: Q1=5-7
3. Large: Q1=8-9

I tried to write the following, but unfortunately wasn't working:

<input name="HIDEDU_SMALL" id="HIDEDU_SMALL" type="hidden" value = "Q1_1 Q1_2 Q1_3 Q1_4">
<input name="HIDEDU_MEDIUM" id="HIDEDU_MEDIUM" type="hidden" value = "Q1_5 Q1_6 Q1_7">
<input name="HIDEDU_LARGE" id="HIDEDU_LARGE" type="hidden" value = "Q1_8 Q1_9">

Can you help me please?

Resolved
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