Riwayat perubahan "add two Natural numbers" (Z13521)
Seleksi Diff: Tandai kotak radio tingon revisi giot mambandingkon dohot pisat enter sanga tombol naitoru.
Legend: (sonnari) = parbedaan dohot revisi tarbaru, (cimak) = parbedaan dohot revisi naparjolo, m = pengeditan menek.