All over the world, peoples are working on energy solution. It would be a tough time for our next generation to survive if we don’t think about solution. Tony stark is working on a new project and wants to display his project using “ seven segment display - concept ”. Tony Stark gave Jarvis a task to find a number from his Favorite list of number for which the energy consumption is lowest. (Assuming that for a digit to represent Tony stark is using 7 bulbs and only those bulbs light up which are required to represent a number and rest other would be completely off. ) Help Jarvis and conserve energy. Seven segment display - https://en.wikipedia.org/wiki/Seven-segment_display Input: First line will contain the number of test cases and for every test case first line will contain length of favorite list and the second line for a test case will contain n numbers Output : For every test case print the answer. If there exist more than 1 numbers for which same number of bulbs are required than...