Exact match letters numbers

The simplest expressions are pattern matching:

str_view(fruit, "berry")

##  [6] │ bil<berry>
##  [7] │ black<berry>
## [10] │ blue<berry>
## [11] │ boysen<berry>
## [19] │ cloud<berry>
## [21] │ cran<berry>
## [29] │ elder<berry>
## [32] │ goji <berry>
## [33] │ goose<berry>
## [38] │ huckle<berry>
## [50] │ mul<berry>
## [70] │ rasp<berry>
## [73] │ salal <berry>
## [76] │ straw<berry>