2. (8 points) Cutting along the dotted line in rectangle $A B C D$ divides it into two parts, which resemble the Chinese characters “凹凸”. Given that the length of rectangle $A D=10$ cm, the width $A B=6$ cm, and $E F=G H=2$ cm; the sum of the perimeters of the two “凹凸” parts is $\qquad$ cm.



Translating the text as requested, while preserving the original formatting and line breaks.
【Solution】Solution: Observing the graph, we can see that the sum of the perimeters of the "concave and convex" parts cut out $=A B+C D+A D+B C+2$
$$
\begin{aligned}
& (M E+F H+G N)+2(E F+G H) \\
= & 6+6+10+10+2 \times 6+2 \times 4 \\
= & 52 \text{ cm},
\end{aligned}
$$

Therefore, the answer is 52.