Language: C

main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}

Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      | ^~~~
main.c: In function 'main':
main.c:1:1: error: type of 'a' defaults to 'int' [-Wimplicit-int]
main.c:1:1: error: type of 'b' defaults to 'int' [-Wimplicit-int]
main.c:1:11: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |           ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
main.c:1:11: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |           ^~~~~
main.c:1:11: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:29: error: expected ')' before '}' token
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                ~            ^
      |                             )
main.c:1:29: error: expected ';' before '}' token
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                             ^
      |                             ;
main.c: At top level:
main.c:1:31: error: expected identifier or '(' before 'if'
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                               ^~
main.c:1:51: error: expected identifier or '(' before 'else'
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                                                   ^~~~
main.c:1:140: error: expected identifier or '(' before 'else'
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                                                                                                                                            ^~~~
main.c:1:186: error: expected identifier or '(' before '}' token
    1 | main(a,b){scanf("%d%d",&a,&b};if(a==2) puts("No");else if(a-4&&a-6&&a-9&&a-11) puts(b==1||b==3||b==5||b==7||b==8||b==10||b==12?"Yes":"No");else puts(y==4||y==6||y==9||y==11?"Yes":"No");}
      |                                                                                                                                                                                          ^