syntax = "proto2";package pb; message Strings {	optional string a = 1;	optional string b = 2;	optional string c = 3;	optional string d = 4;	repeated string s = 5;	repeated string s2 = 6;	repeated string s3 = 7;} message Strings2 {	repeated string a = 1;	repeated string b = 2;	repeated string c = 3;	optional string cnst = 4;}