Javascript 1 Page Project to Return Alphabets based on Date of Birth

We run a website called [login to view URL] about Baby Names. It is made on Wix. We want to develop a simple tool on [login to view URL] It should be made in Javascript which we can embed as Code on the Wix CMS website. Functionality should be as follows:- The User chooses Date of Birth from a Date Picker and then clicks a Button "Generate Letters from which baby's name should begin" Once the Button is clicked, the following should be returned. The Java Script should total the date of birth till it reached single digits. For Example, If date of birth is 5/7/1982 It should return as follows:- "Your Name Number is 5 and your name should begin from G or P" ( Because 5+7+1+9+8+2) is 32 and 3+2 is five. The Letters are chosen from the Chart Given below Suppose Date of Birth is 23/12/2020 It should return as follows:- "Your Name Number is 3 and your Name should begin from D or E or Y " Because Date of birth is 2+3+1+2+2+0+2+0 is 12. 1+2 is 3 The Chart is as follows:- Number Letters 1 ABT 2 CSZ 3 DEY 4 FRX 5 GP 6 HQU 7 INOV 8 JMW 9 KL