Easy as ABC

Also called Letterraam, End View

Put each letter once in every row and column; letters outside are the first one seen.

Rules

  1. Every row and column has A, B and C exactly once; the other cells stay empty.

    ABCCABBACCBA
    ✓ One of each
    ABCBCABACCBA
    ✗ B twice
  2. A letter outside is the first one you meet looking in from that side.

    BBAC
    ✓ B comes first
    ABAC
    ✗ A isn't first

Example: First Letters

ABBAB
The puzzle
ABBABABCACBCBABCA
Solved

Playing here: Tap a cell, then a letter (or type it). Erase leaves a cell empty.

Play First Letters