Hinge equivalent to RRURmRvRvRmU

<br>

<hr>
Alternative construction (more involved):

<ul>
<li>Start from I2.
<li>Fold the two stacked lower tiles in between the two (stacked) tiles above, obtaining a 3x1 rectangle
with a stack of four tiles in the lowest position.
<li>Turn left 180 degrees the top layer of three tiles.
<li>Open into RRURmRvRvRmU, hinge equivalent to the requested shape.
</ul>