How to do the First Last name abbreviation like TCM, KTT in example for flash fill. Example: = left(A6,1)&Right

Tori Ken Raj Mona Mona Phillipe Ken Tori Raj Ken Ken Mona Phillipe Raj Phillipe Mona Mona Mona Raj Phillipe 125.24 Client Meeting 202.14 Travel 2275.00 Vendor 53.09 Travel 1429.08 Supplies 308.11 Travel 98.88 Client Meeting 758.55 Travel 125.65 Travel 484.92 Travel 68.04 Client Meeting 500.00 Vendor 1126.53 Vendor 868.59 Travel 53.02 Supplies 545.64 Travel 198.05 Travel 68.24 Supplies 55.04 Client Meeting 779.08 Travel Total 10122.89 TCM KTT