panic: runtime error: index out of range [3] with length 3

goroutine 1 [running]:
main.solve({0x400012a700, 0x62})
	/home/ubuntu/codeforces/0-999/800-899/890-899/899/verifierF.go:104 +0x810
main.generateTests()
	/home/ubuntu/codeforces/0-999/800-899/890-899/899/verifierF.go:157 +0x2e4
main.main()
	/home/ubuntu/codeforces/0-999/800-899/890-899/899/verifierF.go:188 +0x90
exit status 2