字 is a Japanese kanji written with 6 strokes, listed here under the keyword “character”. It is built from 子 (child) and 宀 (roof). In Remembering the Kanji by James W. Heisig it is frame 197.
On KumiJi Glyph Explorer, open the parts search and type “child” + “roof”. 字 is among the results, together with every other character containing the same shapes.
Open 字 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.