from numpy import*
from numpy.linalg import*
c1 = input("digite a cidade 1:")
m = array([[0,2,11,6,15,11,1],
			  [2,0,7,12,4,2,15],
			  [11,7,0,11,8,3,13],
			  [6,12,11,0,10,2,1],
			  [15,4,8,10,0,5,13],
			  [11,2,3,2,5,0,14],
			  [1,15,13,1,13,14,0]])
t = 0
i = 0
j = 1
while (c1 != "-1"):
	if (i != j):
		i = int(c1[0]) - 1
		c1 = input("digite novamente: ")
	elif (c1 != "-1"):
		j = int(c1[0]) - 1
		t = t + m[i,j]
		c1 = input("digite novamente: ")
		i = j
print(t)