4(134):(135)2(136)3(137) (138)t(139)ố(140)c(141) (142)đ(143)ộ(144) (145)c(146)a(147)o(148) (149)n(150)h(151)ấ(152)t(153).(154) -> 154 characters. Perfect (145-160 required).
Ensure NO markdown around the JSON block. Just the `{…}`.
Checking the system prompt: "Trả lời CHỈ



