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 ""

set len_ch1 2513
set len_ch2 837
set len_ch3 279

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

set info1 [length $result_1]
set info2 [length $result_2]
set info3 [length $result_3]
regexp {The length result_1 is +([-0-9.+eE]+)} $info1 full len1
regexp {The length result_2 is +([-0-9.+eE]+)} $info2 full len2
regexp {The length result_3 is +([-0-9.+eE]+)} $info3 full len3
set len_int1 [expr int($len1)]
set len_int2 [expr int($len2)]
set len_int3 [expr int($len3)]

if { ${len_int1} != ${len_ch1} 
   || ${len_int2} != ${len_ch2} 
   || ${len_int3} != ${len_ch3} } {
   puts "Error : Length is invalid"
}