Customizable Mother's Day Cube

Something that I thought of when my woodshop teacher told the class that we would be making something for Mother's Day. I spent a week on it, got home on Friday and realized that I had left the thing at school. Solution: 3d print it and get the real thing - which has messed up proportions due to my teacher giving me a block with the wrong thickness - on Monday.

It shows an 'M' on two sides, and an 'O' on the other two sides.