#Nhap so do ba canh tu ban phim

#Su dung ham map() va float de ep kieu du lieu sang so thuc

a, b, c = map(float, input().split())

 #Dung cau lenh re nhanh de kiem tra dieu kien cac tam giac

#Kiem tra dieu kien la ba canh cua tam giac

if a+b>c and a+c>b and b+c>a:

   #Kiem tra tam giac vuong

   if a*a==b*b+c*c or b*b==a*a+c*c or c*c==a*a+b*b:

       loaiTamGiac = 'vuong'

   #Kiem tra tam giac deu

   elif a==b and b==c:

       loaiTamGiac = 'deu'

   #Kiem tra tam giac can

   elif a==b or a==c or b==c:

       loaiTamGiac = 'can'

   #Kiem tra tam giac tu

   elif a*a > b*b+c*c or b*b > a*a+c*c or c*c > a*a+b*b:  

       loaiTamGiac = 'tu'

   #Cac truong hop con lai la tam giac nhon

   else:

       loaiTamGiac = 'nhon'

   #Xuat thong bao theo yeu cau

   print('{}, {}, {} la ba canh cua mot tam giac {}'.format(a, b, c, loaiTamGiac))

else:

   print("{}, {}, {} khong phai la ba canh cua mot tam giac".format(a, b, c))