Moving data and merging partitions isn't going to create any more space. If what you need is a contiguous 19 GB of hard drive, you could use a program such as Acronis to resize your existing two partitions.
But - if you resize the partition with your hard drive down to a minimum, then it won't be long before you get warnings about a lack of space on the partition with the Operating system.
As all you want is 19 GB of space, and you don't have this much space on either partition, it might be an appropriate time to add a second hard drive. Then you don't have to mess with your working setup.