fold-right

(fold-right f initial list1 list2 ...)

Combines the elements of the lists from the right: (f e1 (f e2 (f e3 initial))). With several lists f takes one element of each and then the result so far, and the fold stops at the end of the shortest list. A Structure and Interpretation of Computer Programs (SICP)/MIT name, not R7RS: no library exports it, so it is visible only to a file with no import and at the REPL.