/a.\{1,5\}b.\{1,5\}c/{
    s/^/G1: /
    s/a/[a]/g
    s/b/[b]/g
    s/c/[c]/g
    p
    n
}
/a.\{1,5\}b/{
    s/^/G2: /
    s/a/[a]/g
    s/b/[b]/g
    p
    n
}