7. The method of claim 1 , wherein the at least one character key is a first character key, the method further comprising: receiving, by the computing device, a fourth gesture to select at least a second character key from the plurality of character keys, wherein outputting the replacement character string to replace at least the portion of the character string is further responsive to receiving, by the computing device, an indication of a termination of at least the fourth gesture.
7. The method of claim 1 , wherein the at least one character key is a first character key, the method further comprising: receiving, by the computing device, a fourth gesture to select at least a second character key from the plurality of character keys, wherein outputting the replacement character string to replace at least the portion of the character string is further responsive to receiving, by the computing device, an indication of a termination of at least the fourth gesture. 8. The method of claim 7 , wherein receiving the fourth gesture to select the second character key from the plurality of character keys comprises receiving the fourth gesture while the first gesture is detected at an input device.