This picross is very easy but long.
When you'll be finished with it, can you try to solve the following enigme :
"Is it possible to connect each house with each utility, avoiding any cross or touch between the connections ?"

If you didn't know this (already) old enigma before today, try to solve it without any internet help.
Then, when you'll be angry with this picross, take a look at the following page : "https://en.wikipedia.org/wiki/Three_utilities_problem"