Old Turkic Letter Orkhon Aey (U+10C18) is a Unicode other letter from the Old Turkic block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class R (right-to-left), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𐰘 or 𐰘. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.