28 + 179 = 207 223 + 224 = 447 1023 + 10234 = 11257 10468 + 23579 = 34047 12468 + 103579 = 116047 111111 + 111111 = 222222 100009 + 1000009 = 1100018 100009 + 1000009 = 1100018 900000 + 1000000 = 1900000 900000 + 1000000 = 1900000 1000000 + 9000000 = 10000000 1000000 + 9000000 = 10000000 1000008 + 2000009 = 3000017 1000008 + 2000009 = 3000017