2p17-2p3-fel1

# ACEExample "2p17-2p3-fel1" : enumeration of cosets of H in G,
# where |G| = 2^17, |G : H| = 2^3, using felsch := 1 strategy.
#
local F, G, a, b, c, A, B, C;
# We define a 3-generator deficiency 0 group cfd0R7, |cfd0R7| = 2^17 
F := FreeGroup("a","b","c"); a := F.1;  b := F.2;  c := F.3;
                             A := a^-1; B := b^-1; C := c^-1;
G := F / [a*B*C*b*a*c, b*A*C*b*a*a*c*A, a*c*c*A*A*B*a*b];
return ACEfunc(
    FreeGeneratorsOfFpGroup(G), 
    RelatorsOfFpGroup(G), 
    [b*c, A*B*A*A*b*c*a*b*C] # Generators of H, |G : H| = 2^3
    # Options that don't affect the enumeration
    : echo, enum := "cfd0R7 (order 2^17)", subg := "H (index 2^3)", 
    # Other options
    wo := "6M", felsch := 1, mend,   dmod := 3, dsiz := 1000,
    psiz := 2,  fill := 5,   mess := 50000);