Shell Programming and Scripting

awk 'NR == FNR {T[substr($1, 5, 7)] = $1; next} !($1$2 in T)

NR == FNR   ## Apply the action to only the lines from first file
{T[substr($1, 5, 7)] = $1;...}  ## Create an associative array which index is the return from substr(), and the value is the first field.
{...; next}  ## Skip to next line

!($1$2 in T)  ## execute {...} for any line from second file if the concatenation of field one and two is not an index found in the associative array T.