M := ModularSymbols(1,12,1);
M;
C := CuspidalSubspace(M);
C;
HeckeOperator(C,2);
HeckeOperator(C,3);
HeckeOperator(C,4);
HeckeOperator(C,5);

M := ModularSymbols(1,4,1);
M;
HeckeOperator(M,2);
HeckeOperator(M,3);
HeckeOperator(M,4);
HeckeOperator(M,5);

M := ModularSymbols(1,4,GF(2),1);
M;
HeckeOperator(M,2);
HeckeOperator(M,3);
HeckeOperator(M,4);
HeckeOperator(M,5);

M := ModularSymbols(1,4,GF(3),1);
M;
HeckeOperator(M,2);
HeckeOperator(M,3);
HeckeOperator(M,4);
HeckeOperator(M,5);