Which term comes next in the alphanumeric series?
$$\text{YEB},\text{WFD},\text{UHG},\text{SKI},?$$

Let us track the position of each letter separately:
1. First Letter: $\text{Y}(25)\stackrel{-2}{\to }\text{W}(23)\stackrel{-2}{\to }\text{U}(21)\stackrel{-2}{\to }\text{S}(19)\stackrel{-2}{\to }\text{Q}(17)$
2. Second Letter: $\text{E}(5)\stackrel{+1}{\to }\text{F}(6)\stackrel{+2}{\to }\text{H}(8)\stackrel{+3}{\to }\text{K}(11)\stackrel{+4}{\to }\text{O}(15)$
3. Third Letter: $\text{B}(2)\stackrel{+2}{\to }\text{D}(4)\stackrel{+3}{\to }\text{G}(7)\stackrel{+2}{\to }\text{I}(9)\stackrel{+3}{\to }\text{L}(12)$

Combining these letters yields the term $\text{QOL}$.