Hint: I use `Ḣ` . Solution link below
https://tio.run/##RY2hDsIwGIQ9T3EkJJjBC@BQLFgSdJP90JF2bdp/S2YxWCSOBD2FmmZPMl6kdDXIu3z33YWUakMY@9dm7J/DY7uYjf370w3303D7Xrt9CCFfagioklkRmIQ1nAFeGscQVQHPpuY1duQIpYduIWOtKIP8V94m6CipQo4zxalScUpCU4HaYhVp4aBpMtc8B3Ao7ZRNQy4dRUUCkukH