import sys

verify = [521, 339, 1028, 365, 1132, 352, 833]
if len(sys.argv[1]) != len(verify): sys.exit(-1)

for i in range(0,7):
    char = ord(sys.argv[1][i])
    char = (char + i) * 13 - 337
    if char != verify[i]: sys.exit(-1)

print ('[v] correct')