Type in the three sides:
     1    1    1
 Equilateral
 Type in the three sides:
     2    2    1
 Isoceles
 Type in the three sides:
     1    1    0
 Not a Triangle
 Type in the three sides:
     3    4    5
 Scalene
 Type in the three sides:
     3    2    1
 Not a Triangle
 Type in the three sides:
     1    2    4
 Not a Triangle