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"E123." (n.d.). Fullformexpand.com. Retrieved February 18, 2026, from https://www.fullformexpand.com/e123/easy-as-1-2-3.
E123. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/e123/easy-as-1-2-3 (Accessed: 18 February 2026).