panic: runtime error: index out of range [6] with length 6

goroutine 1 [running]:
main.solveD({0x400000e8b0, 0x10})
	/tmp/cf-worker-465848862/verifierD.go:191 +0xaa8
main.runCase({0xffffc8553c02, 0x29}, {{0x400000e8b0?, 0x2?}})
	/tmp/cf-worker-465848862/verifierD.go:243 +0x3c
main.main()
	/tmp/cf-worker-465848862/verifierD.go:266 +0x118