puts "=================================="
puts "BUC60622"
puts "=================================="
puts "There was an infinity of solutions and also c1, c2 and c3 are solutions"
puts ""
puts "It takes visual check for this BUG"
puts "=================================="
puts ""

circle c1 500 1800 500 
circle c2 500 1900 400 
circle c3 700 1900 200 
cirtang result c1 c2 c3

checklength result_1 -l 2513.2741228703289
checklength result_2 -l 837.75804095727631
checklength result_3 -l 279.2526803190928