(<:@#,{:) */@(10&#.inv)^:a: 123321
3 8
   (<:@#,{:) */@(10&#.inv)^:a: 7739
3 8
   (<:@#,{:) */@(10&#.inv)^:a: 893
3 2
   (<:@#,{:) */@(10&#.inv)^:a: 899998
2 0