Puzzle ZKNL

Can you add two lines to complete this sequence of towers?

5 towers with roofs: v-shaped+spire, v-shaped, double-v shaped, v-shaped, u-shaped.

Note: this puzzle is not interactive, and cannot be clicked.

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Answer
Add the two lines to the second tower from the left to complete the 'X' in the inverted letter sequence U, V, W, X, Y forming the towers' roofs.