Gallian c13p57

mods = [7, 8, 12, 14]
for mod in mods:
    for x in range(0, mod):
        xsq = x * x
        xsq %= mod
        fx = -5 * x
        fx %= mod
        total = xsq + fx + 6
        total %= mod

        if total == 0:
            print("Z", mod, ": ", x, sep="")

# Z7: 2
# Z7: 3
# Z8: 2
# Z8: 3
# Z12: 2
# Z12: 3
# Z12: 6
# Z12: 11
# Z14: 2
# Z14: 3
# Z14: 9
# Z14: 10