I'm trying to see if this layout is possible with lightning layout without thinkering about the positioning via CSS. Basically, what I'm trying to do is to line up the content C layout with the green component (fixed height/width). Something like below screenshot. I tried alignmentBump="end" and played around slds-grid_vertical-align-end and slds-align-bottom but I'm not able to achieve what I am trying to do. It sounds simple, and I'm sure i'm just missing something. Any guidance would be appreciated.
<lightning:layout multipleRows="true" verticalAlign="stretch">
<lightning:layoutItem size="12">
Title Header
</lightning:layoutItem>
<lightning:layoutItem size="4">
<lightning:layout multipleRows="true">
<lightning:layoutItem size="12">
A
</lightning:layoutItem>
<lightning:layoutItem size="12">
B
</lightning:layoutItem>
<lightning:layoutItem size="12" alignmentBump="bottom">
C <!-- This content, should align at the bottom of the fixedHeightWidth Component -->
</lightning:layoutItem>
</lightning:layout>
</lightning:layoutItem>
<lightning:layoutItem size="8">
<c:fixedHeightWidthComponent />
</lightning:layoutITem>
</lightning:layout>