c:\@Work\Perl\monks>perl -wMstrict -le
"my @strings = (
   'SMS,SMS1,20190811',
   'SMS,SMSh,20190811',
   'SMS,SMSH,20190811',
   'SMS,SMSx,20190811',
   'SMS,SMSi,20190811',
   'SMS,SMSX,20190811',
   'SMS,SMSI,20190811',
   );
 ;;
 for my $s (@strings) {
   my $ref_s = \$s;
   print qq{'$$ref_s' matches}
     if $$ref_s =~ /SMSi/i
     || $$ref_s =~ /SMSI/i
     || $$ref_s =~ /SMSh/i
     || $$ref_s =~ /SMSH/i
     || $$ref_s =~ /SMS1/
     ;
   }
"
'SMS,SMS1,20190811' matches
'SMS,SMSh,20190811' matches
'SMS,SMSH,20190811' matches
'SMS,SMSi,20190811' matches
'SMS,SMSI,20190811' matches