Before revision:  In particular, motivated by error correction and reconstruction problems in DNA-based data storage applications, we determine the size of "balls" of radius one in the TDRL metric, as well as the cardinality of the maximum intersection of two balls .
After revision:  In particular, motivated by error correction and reconstruction problems in DNA-based data storage applications, we determine the size of "balls" of radius one in the TDRL metric, as well as the cardinality of the maximum intersection of two such balls, are determined .